SUMMIT DESIGN INC
10-Q, 1998-05-14
PREPACKAGED SOFTWARE
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<PAGE>

                                          
                                   UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C. 20549
                                          
                                     FORM 10-Q
                                          
                                          
                                          

 X  Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934
    for the quarterly period ended March 31, 1998 or

     Transition report pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934
     for the transition period from ________ to ________             

Commission file number:  0-20923
     
     
     
                                SUMMIT DESIGN, INC.
                (Exact name of registrant as specified in its charter)

               DELAWARE                               93-1137888
   (State or other jurisdiction of     (I.R.S. Employer Identification Number)
    incorporation or organization)

                              9305 S. W. GEMINI DRIVE,
                              BEAVERTON, OREGON  97008
                      (Address of principal executive office)
        Registrant's Telephone number, including area code:  (503) 643-9281

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.   Yes   X      No        
                                         -----        -----

As of May 12, 1998, the Registrant had outstanding 14,819,310 shares of 
Common Stock.

<PAGE>


                                SUMMIT DESIGN, INC.
                                       INDEX

<TABLE>
<S>       <C>                                                                 <C>
PART I    FINANCIAL INFORMATION

Item 1    Condensed Consolidated Financial Statements

          Condensed Consolidated Balance Sheets as of March 31, 1998 
          (unaudited) and December 31, 1997.                                   3

          Condensed Consolidated Statements of Operations for the 
          three month periods ended March 31, 1998 and 1997 (unaudited).       4
 
          Condensed Consolidated Statements of Cash Flows for
          the three month periods ended March 31, 1998 and 1997 (unaudited).   5

          Notes to Condensed Consolidated Financial Statements.                6

Item 2    Management's Discussion and Analysis of Financial
            Condition and Results of Operations                                8

PART II     OTHER INFORMATION

Item 2    Changes in Securities and Use of Proceeds

Item 6    Exhibits and Reports on Form 8-K

Items 1, 3, 4 and 5  Not Applicable 

Signature

Exhibit Index
</TABLE>

                                       -2-

<PAGE>

                                SUMMIT DESIGN, INC.
                       CONDENSED CONSOLIDATED BALANCE SHEETS
                                   (in thousands)

<TABLE>
<CAPTION>

                                                   March 31, 1998  December 31, 1997
                                                   --------------  -----------------
                                                     (Unaudited)
<S>                                                <C>             <C>
                      ASSETS
Current assets:
  Cash and cash equivalents                            $  20,364      $  19,898 
  Accounts receivable, net                                 5,278          5,110 
  Prepaid expenses and other                                 426            520 
  Deferred income taxes                                    1,214          1,209 
                                                       ---------      ---------
    Total current assets                                  27,282         26,737 

Furniture and equipment, net                               2,860          2,666 
Intangibles, net                                           1,499          1,622 
Deferred taxes                                               555            533 
Deposits and other assets                                  1,026          1,055 
                                                       ---------      ---------
    Total assets                                       $  33,222      $  32,613 
                                                       ---------      ---------
                                                       ---------      ---------
                    LIABILITIES
Current liabilities:
  Long-term debt, current portion                         $  105         $  105 
  Capital lease obligation, current portion                   45             49 
  Accounts payable                                         1,248          1,182 
  Accrued liabilities                                      4,919          5,157 
  Deferred revenue                                         5,265          5,668 
                                                       ---------      ---------
    Total current liabilities                             11,582         12,161 

Long-term debt, less current portion                         156            156 
Capital lease obligations, less current portion               32             43 
Deferred revenue, less current portion                       190              - 
                                                       ---------      ---------
    Total liabilities                                     11,960         12,360 
                                                       ---------      ---------

Commitments and contingencies

               STOCKHOLDERS' EQUITY
Common stock, $.01 par value.  Authorized 30,000
shares; issued and outstanding 15,839 shares at
March 31, 1998 and 15,631 shares at 
December 31, 1997                                            158            156 
Additional paid-in capital                                52,508         51,772 
Treasury stock, at cost, 1,102 shares at 
March 31, 1998 and 939 shares at December 31, 1997       (13,884)       (11,555)
Accumulated deficit                                      (17,520)       (20,120)
                                                       ---------      ---------
    Total stockholders' equity                            21,262         20,253 
                                                       ---------      ---------
      Total liabilities and stockholders' equity       $  33,222      $  32,613 
                                                       ---------      ---------
                                                       ---------      ---------
</TABLE>

     The accompanying notes are an integral part of the condensed consolidated
                                financial statements


                                       -3-

<PAGE>

                                SUMMIT DESIGN, INC.
                  CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                       (In thousands, except per share data)
                                    (Unaudited)
                                          
                                          
<TABLE>
<CAPTION>
                                                      Three Months Ended
                                                           March 31,
                                                      -------------------
                                                        1998       1997
                                                      --------   --------
     <S>                                              <C>        <C>
     Revenue:
          Product licenses                            $  8,072   $  4,878 
          Maintenance and services                       2,042      1,481 
          Other                                             92        142 
                                                      --------   --------
          Total revenue                                 10,206      6,501 

     Cost of revenue:
          Product licenses                                 278        185 
          Maintenance and services                         211        109 
                                                      --------   --------
          Total cost of revenue                            489        294 
                                                      --------   --------
          Gross profit                                   9,717      6,207 
                                                      --------   --------
                                                      --------   --------
     Operating expenses:
          Research and development                       2,343      1,431 
          Sales and marketing                            3,024      2,517 
          General and administrative                     1,093      1,177 
                                                      --------   --------
          Total operating expenses                       6,460      5,125 
                                                      --------   --------
                                                      --------   --------

     Income from operations                              3,257      1,082 

     Interest expense                                       (1)        (7)
     Other income, net                                     289        218 
                                                      --------   --------
     Income before income taxes                          3,545      1,293 
     Income tax provision                                  945         80 
                                                      --------   --------
     Net income                                       $  2,600   $  1,213 
                                                      --------   --------
                                                      --------   --------
     Earnings per share:
         Basic                                         $  0.18    $  0.09 
                                                      --------   --------
                                                      --------   --------
         Diluted                                       $  0.16    $  0.08
                                                      --------   --------
                                                      --------   --------
     Number of shares used computing earnings 
         per share:
         Basic                                          14,695     13,902
                                                      --------   --------
                                                      --------   --------
         Diluted                                        15,953     14,829 
                                                      --------   --------
                                                      --------   --------
</TABLE>

     The accompanying notes are an integral part of the condensed consolidated
                                financial statements

                                       -4-

<PAGE>

                                SUMMIT DESIGN, INC.
                  CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (In thousands)
                                    (Unaudited)
                                          

<TABLE>
<CAPTION>
                                                        Three Months Ended
                                                             March 31,
                                                        ------------------
                                                          1998       1997
                                                        --------   -------
<S>                                                     <C>        <C>
Cash flows from operating activities:
  Net income                                            $  2,600   $  1,213 
  Adjustments to reconcile net income to net cash
    provided by operating activities:
     Depreciation and amortization                           377        194 
     Loss on asset disposition                                 -          1 
     Deferred taxes                                          (27)         - 
     Changes in assets and liabilities:
       Accounts receivable                                  (168)      (321)
       Prepaid expenses and other                             94        (11)
       Accounts payable                                       66        408 
       Accrued liabilities                                  (238)       (96)
       Deferred revenue                                     (213)      (918)
       Other, net                                            154         35 
                                                       ---------   --------
  Net cash provided by operating activities                2,645        505 
                                                       ---------   --------
Cash flows from investing activities:
  Additions to furniture and equipment                      (448)      (251)
  Notes receivable from related parties, net                (125)       (75)
                                                       ---------   --------
  Net cash used in investing activities                     (573)      (326)
                                                       ---------   --------
Cash flows from financing activities:
  Issuance of common stock, net of issuance costs            288         14 
  Tax benefit of option exercises                            450          - 
  Payments to acquire treasury stock                      (2,329)         - 
  Principal payments of debt obligations                       -        (71)
  Principal payments of capital lease obligations            (15)       (35)
                                                       ---------   --------
  Net cash used in financing activities                   (1,606)       (92)
                                                       ---------   --------
  Increase in cash and cash equivalents                      466         87 
Cash and cash equivalents, beginning of period            19,898     19,772 
                                                       ---------   --------
Cash and cash equivalents, end of period               $  20,364  $  19,859 
                                                       ---------   --------
                                                       ---------   --------
Supplemental disclosure of cash flow information:
  Cash paid during the period for:
  Interest                                                  $  1       $  7 
  Income taxes                                               547         32 
</TABLE>
     The accompanying notes are an integral part of the condensed consolidated
                                financial statements

                                       -5-

<PAGE>

                                SUMMIT DESIGN, INC.
                Notes to Condensed Consolidated Financial Statements
                                    (Unaudited)


1.   BASIS OF PRESENTATION

The accompanying unaudited financial statements have been prepared by Summit
Design, Inc. ("Summit" or the Company) in accordance with the rules and
regulations of the Securities and Exchange Commission.  Certain information and
footnote disclosures normally included in financial statements prepared in
accordance with generally accepted accounting principles have been condensed or
omitted in accordance with such rules and regulations.  In the opinion of
management, the accompanying unaudited financial statements reflect all
adjustments, consisting only of normal recurring adjustments, necessary to
present fairly the financial position of the Company, and its results of
operations and cash flows.  These financial statements should be read in
conjunction with the audited financial statements and notes thereto for the
years ended December 31, 1997 1996 and 1995 included in the Company's Form 10-K
filed for December 31, 1997.

The results of operations for the three months ended March 31, 1998 are not
necessarily indicative of the results that may be expected for the year ended
December 31, 1998 or any other future interim period, and the Company makes no
representations related thereto.

2.   SOFTWARE REVENUE RECOGNITION

During the first quarter of 1998, the Company adopted Statements of Position 
(SOP) 97-2, "Software Revenue Recognition" and 98-4, "Deferral of the 
Effective Date of a Provision of SOP 97-2, "Software Revenue Recognition." 
The provisions of SOP's 97-2 and 98-4 have been applied to transactions 
entered into beginning January 1, 1998. SOP 97-2 generally requires revenue 
earned on software arrangements involving multiple elements to be allocated 
to each element based on vendor-specific objective evidence (VSOE) of the 
fair value of the various elements in a multiple element arrangement. The 
revenue allocated to product licenses generally is recognized upon delivery 
of the license. The revenue allocated to maintenance is recognized ratably 
over the term of the maintenance agreement and revenue allocated to services 
is recognized as the services are performed.

SOP 98-4 defers for one year, the application of several paragraphs and 
examples in SOP 97-2 that limit the definition of vendor specific objective 
evidence (VSOE) of the fair value of various elements in a multiple element 
arrangement.

The Company analyzed the elements included in its multiple element 
arrangements and determined that the Company has sufficient evidence to 
allocate revenue to the license and maintenance components of its product 
licenses. The adoption of SOP's 97-2 and 98-4 did not have a significant 
effect on revenue recognized for the period ending March 31, 1998.

3.   BALANCE SHEET COMPONENTS (IN THOUSANDS)

<TABLE>
<CAPTION>
                                              March 31, 1998   December 31, 1997
                                              --------------   -----------------
                                               (Unaudited)
<S>                                           <C>              <C>
Accounts Receivable:
     Trade receivables                             $  5,870          $  5,702 
     Less allowance for doubtful accounts              (592)             (592)
                                              --------------   --------------
                                                   $  5,278          $  5,110 
                                              --------------   --------------
                                              --------------   --------------

Furniture and equipment:
     Office furniture equipment                      $  627            $  596 
     Computer equipment                               3,967             3,553 
     Leasehold improvements                              69                66 
                                              --------------   --------------
                                                      4,663             4,215 
Less: accumulated depreciation and 
  amortization                                       (1,803)           (1,549)
                                              --------------   --------------
                                                   $  2,860          $  2,666 
                                              --------------   --------------
                                              --------------   --------------

Accrued expenses:
     Payroll and related benefits                  $  2,769          $  2,862 
     Sales and marketing                                547               435 
     Accounting and legal                               286               260 
     Federal and state income taxes payable             795               819 
     Sales taxes payable                                 68               114 
     Other                                              454               667 
                                              --------------   --------------
     Total accrued expenses                        $  4,919          $  5,157 
                                              --------------   --------------
                                              --------------   --------------
</TABLE>

                                       -6-

<PAGE>

                                SUMMIT DESIGN, INC.
                Notes to Condensed Consolidated Financial Statements
                                    (Unaudited)

4.   RECONCILIATION OF EARNINGS PER SHARE

On January 1, 1998, the Company adopted Statement of Financial Accounting 
Standards (SFAS) No. 128, "Earnings Per Share." In accordance with SFAS No. 
128, basic earnings per share is computed using the weighted average number of 
common shares outstanding during the period. Diluted earnings per share is 
computed using the weighted average number of common and dilutive common 
equivalent shares outstanding during the period. Dilutive common equivalent 
shares consist of common stock issuable upon exercise of stock options using 
the treasury stock method. The following provides a reconciliation of the 
numerators and denominators of the basic and diluted per share computations:

<TABLE>
<CAPTION>
                                                             March 31,
                                                        -------------------
                                                          1998       1997   
                                                        -------------------
           <S>                                          <C>        <C>
           Numerator:
             Net income                                 $  2,600   $  1,213 
                                                        --------   --------
                                                        --------   --------
           Denominator:
             Denominator for basic earnings per share
                weighted average shares                   14,695     13,902 

             Effect of dilutive securities:
                Employee stock options                     1,258        927
                                                        --------   -------- 

             Denominator for diluted earnings per share   15,953     14,829
                                                        --------   --------
                                                        --------   -------- 

           Net income per share - basic                  $  0.18    $  0.09
                                                        --------   --------
                                                        --------   -------- 

           Net income per share - diluted                $  0.16    $  0.08
                                                        --------   --------
                                                        --------   -------- 
</TABLE>

                                       -7-

<PAGE>


ITEM 2    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
          RESULTS OF OPERATIONS


IMPORTANT NOTE ABOUT FORWARD LOOKING STATEMENTS

The following discussion contains forward looking statements within the 
meaning of Section 27A of the Securities Act of 1933 and Section 21E of the 
Securities Exchange Act of 1934.  Predictions of future events are inherently 
uncertain. Actual events could differ materially from those predicted in the 
forward looking statements as a result of the risks set forth in the 
following discussion, and, in the particular, the risks discussed below under 
the subheading "Additional Risk Factors that Could Affect Operating Results 
and Market Price of Stock."

OVERVIEW

Summit was founded in December 1993 to act as the holding company for Test 
Systems Strategies, Inc. ("TSSI") and SEE Technologies, (now Summit Design 
(EDA) Ltd.) (collectively , the "Reorganization").  TSSI was founded in 1979 
to develop and market integrated circuit ("IC" or "chip") manufacturing test 
products. In January 1993, TSSI retained a new Chief Executive Officer and 
began to restructure its senior management team. Thereafter, the Company 
broadened its strategy from focusing primarily on manufacturing test products 
to include providing high level design automation ("HLDA") design creation 
and verification tools and integrating these with its core technology. As 
part of its strategy, in early 1994, TSSI acquired SEE Technologies, an 
Israeli company that, through its predecessor, began operations in 1983 and 
had operated primarily as a research and development and consulting company 
focused on the electronic design automation ("EDA") and HLDA market. As a 
result of the Reorganization, TSSI and SEE Technologies became wholly-owned 
subsidiaries of Summit in the first quarter of 1994.

The Company's ongoing implementation of its strategy has involved significant 
expenditures. Following the Reorganization, the Company significantly 
increased its research and development expenditures to support the continued 
development of HLDA and Design to Test products. To promote its products, the 
Company added sales and marketing staff, increasing its sales and marketing 
expenditures by 187% from 1993 to 1997, and has restructured its key 
distributor relationships. This concurrent effort to develop products and 
promote market awareness and acceptance of its products in a new and evolving 
market contributed to the Company's annual losses through 1995.  The Company 
introduced its first HLDA Plus product, Visual HDL for VHDL 1.0, in the first 
quarter of 1994. This product lacked compiled simulation and operated only on 
a PC platform. In the third quarter of 1994, with the release of version 2.5, 
Summit expanded the simulation capability of Visual HDL for VHDL and 
introduced its UNIX-based version of this product.

Prior to the Reorganization, the Company's Test Development Series ("TDS") 
product and related maintenance revenue accounted for all of the Company's 
revenue. After the Reorganization and through June 30, 1997, the Company's 
revenue was predominantly derived from two product lines, Visual HDL, which 
includes Visual HDL for VHDL and Visual HDL for Verilog, and TDS.  As the 
result of the July 1997 sale of the TDS product line, Design to Test products 
are no longer a source of revenue for the Company.  With  the acquisition of 
TriQuest Design Automation, Inc. ("TriQuest") in February 1997 and Simulation 
Technologies Corp. ("SimTech"), in September 1997, the Company has also 
derived revenue from verification products which include hardware-software 
co-verification, code coverage, and HDL debugging products, as well as 
analysis, verification and Register Transfer Language ("RTL") optimization 
tools.

Revenue consists primarily of fees for licenses of the Company's software 
products, maintenance and customer training. Revenue from the sale of 
software licenses is recognized at the later of the time of shipment or 
satisfaction of all acceptance terms. Maintenance revenue is deferred and 
recognized ratably over the term of the maintenance agreement, which is 
typically 12 months. Revenue from customer training is recognized when the 
service is performed. Revenue earned on software arrangements involving 
multiple elements is allocated to each element based on vendor-specific 
objective evidence (VSOE) of the fair value of the various elements within 
the arrangement. The Company sells its products through a direct sales force 
in North America and selected European countries and through distributors in 
the Company's other international 

                                       -8-

<PAGE>

markets. Revenue from product sales through distributors is recognized net of 
the associated distributor discounts. Fees received for granting distribution 
rights are deferred and recognized ratably over the term of the distribution 
agreement. Although the Company has not adopted a formal return policy, the 
Company generally reimburses customers in full for returned products. 
Estimated sales returns are recorded upon delivery of the product.

The Company's products have a range of prices which depend on platform, HDL 
language, functionality and duration of license. In addition, the Company's 
products perform a variety of functions, certain of which are, and in the 
future may be, offered as separate products or discrete point solutions by 
the Company's existing and future competitors. For example, certain companies 
currently offer design entry products without simulators. There can be no 
assurance that such competition will not cause the Company to offer point 
solutions instead of, or in addition to, the Company's current software 
products. Such point solutions would be priced lower than the Company's 
current product offerings and could cause the Company's average selling 
prices to decrease. Accordingly, based on these and other factors, the 
Company expects that average selling prices for its products may continue to 
fluctuate in the future.

The Company entered into a joint venture with Anam, effective April 1, 1996, 
pursuant to which the joint venture corporation (Summit Design Asia Ltd. 
("Summit Asia")) acquired exclusive rights to sell, distribute and support 
all of Summit's products in the Asia-Pacific region, excluding Japan. Prior 
to that date, Anam was an independent distributor of the Company's products 
in Korea. The amount of revenue from sales through Summit Asia, which is 
remitted to the Company, is fixed by the joint venture agreement at a 
percentage which approximates the percentage applicable to sales through Anam 
prior to the formation of the joint venture. For the three months ended March 
31, 1998 and 1997, Anam and Summit Asia together accounted for 3.9% and 4.5% 
of the Company's revenue, respectively.

The Company accounts for its ownership interest in Summit Asia on the equity 
method of accounting and, as a result, the Company's pro rata share of the 
earnings and losses of Summit Asia are recognized as income or losses in the 
Company's income statement in "Other income, net." The Company does not 
expect Summit Asia to recognize a profit for the foreseeable future and thus 
does not expect to recognize income from its investment in Summit Asia for 
the foreseeable future, if at all. The Company is currently restructuring the 
ownership and responsibilities of Summit Asia. There can be no assurance that 
any restructuring would result in Summit Asia becoming profitable or that 
revenue attributable to sales in the Asia Pacific region, excluding Japan, 
would increase. 

Approximately 32% and 53% of the Company's total revenue for the three months 
ended March 31, 1998 and 1997, respectively, were attributable to sales made 
outside the United States. The decline in the percentage of revenue from 
sales made outside the United States in 1998 is primarily the result of (1) 
domestic sales to one customer, (2) the loss of Design to Test product sales 
in the last half of 1997 as a result of the sale of the product line, which 
had a strong international market, and (3) the addition of revenue from 
products acquired in the SimTech acquisition which had a principally domestic 
market. The Company expects that international revenue will continue to 
represent a significant portion of its total revenue.  The Company's 
international revenue is currently denominated in U.S. dollars. As a result, 
increases in the value of the U.S. dollar relative to foreign currencies 
could make the Company's products more expensive and, therefore, potentially 
less competitive in those markets. The Company pays the expenses of its 
international operations in local currencies and does not engage in hedging 
transactions with respect to such obligations. International sales and 
operations are subject to numerous risks, including tariff regulations and 
other trade barriers, requirements for licenses, particularly with respect to 
the export of certain technologies, collectability of accounts receivable, 
changes in regulatory requirements, difficulties in staffing and managing 
foreign operations and extended payment terms.(1)

- -------------------
(1) This paragraph contains forward-looking statements reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations. Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
page 16 for a discussion of factors that could affect future 
performance.

                                       -9-
<PAGE>

On February 28, 1997, Summit completed its acquisition of TriQuest. TriQuest 
develops HDL analysis, optimization, and verification  tools for the design 
of high performance, deep submicron integrated circuits.  The transaction has 
been accounted for as a "pooling of interest" in accordance with generally 
accepted accounting principles.

Effective July 1, 1997 the Company sold substantially all of the assets used 
in its business of developing and marketing its Test Development Series "TDS" 
Products (the "Asset Sale") to Credence Systems Corporation ("CSC").  The 
increase in the Company's product licenses revenue during the last twelve 
months has been primarily due to increased revenue associated with the 
Company's HLDA Plus products.  The Asset Sale will allow the Company to focus 
on the development and marketing of these products.

Substantially all of the Company's Design to Test product license revenue and 
related maintenance and services revenue for the three months ended March 31, 
1997 were attributable to the TDS products.  As of July 1, 1997, TDS products 
ceased to be a source of such revenues.  CSC assumed the Company's 
obligations under TDS maintenance contracts entered into prior to the closing 
and the Company has not recognized deferred revenue associated with such 
contracts after June 30, 1997.

The Company maintained exclusive rights to its Visual Testbench technology 
and CSC agreed to purchase a minimum of $16,000,000 of Visual Testbench 
licenses over a thirty-month period subject to specified quarterly maximums 
and certain additional conditions, and $2,000,000 of maintenance over an 
eighteen month period beginning July 1997.  At the completion of the thirty 
month period, under certain conditions, CSC may obtain shared ownership to 
the Visual Testbench for sales into the ATE marketplace.

On September 9, 1997, the Company acquired SimTech, a company that develops 
and distributes hardware-software co-verification, code coverage and HDL 
debugging software. The aggregate consideration for the acquisition 
(including shares of common stock reserved for issuance upon exercise of 
SimTech options assumed by the Company) was 1,980,000 shares of Summit common 
stock and $3,875,000 in cash. The transaction was accounted for using the 
purchase method of accounting. Accordingly, the results of operations for the 
period from September 9, 1997 are included in the consolidated statements of 
operations. The purchase price was allocated to the net assets acquired based 
on their estimated fair market values at the date of acquisition. The fair 
value of tangible assets acquired and liabilities assumed were $1.3 million 
and $2.2 million, respectively. In addition, $19.9 million was allocated to 
in-process technology which had not reached technological feasibility and had 
no probable alternative uses, which the Company expensed as of the 
acquisition date. The remainder of the purchase price was allocated to 
purchased technology ($1,037,000) and identifiable intangibles ($735,000), 
which are being amortized on a straight line basis over three and five years 
respectively.

In connection with the acquisition of SimTech, the Company repurchased 
939,000 shares of common stock in private transaction at an average price of 
$12.30 per share for $11,555,000 in September 1997.

On December 23, 1997, the Company announced that the Board of Directors had 
authorized the repurchase of up to 750,000 shares of the Company's Common 
Stock. From January 1, 1998 to May 12, 1998, the Company repurchased 162,500 
shares of its common stock at a cost of $2.3 million.

                                       -10-

<PAGE>

RESULTS OF OPERATIONS

The following table sets forth for the periods indicated, certain financial data
as a percentage of revenue.


<TABLE>
<CAPTION>
                                           Three Months Ended 
                                                 March 31,
                                          --------------------
                                            1998        1997
                                          --------    --------
<S>                                       <C>         <C>
Revenue:
     Product licenses                         79.1%       75.0%
     Maintenance and services                 20.0        22.8
     Other                                     0.9         2.2
                                          --------    --------
     Total revenue                           100.0       100.0
Cost of revenue:
     Product licenses                          2.7         2.8
     Maintenance and services                  2.1         1.7
                                          --------    --------
     Total cost of revenue                     4.8         4.5
                                          --------    --------
     Gross profit                             95.2        95.5
Operating expenses:
     Research and development                 23.0        22.0
     Sales and marketing                      29.6        38.7
     General and administrative (a)           10.7        18.1
                                          --------    --------
     Total operating expenses                 63.3        78.8
                                          --------    --------
                                          --------    --------
Income from operations                        31.9        16.7
Other income (expense), net                    2.8         3.2
                                          --------    --------
Income before income taxes                    34.7        19.9
Income tax provision                           9.3         1.2
                                          --------    --------
Net income                                    25.4%       18.7%
                                          --------    --------
                                          --------    --------
</TABLE>

(a)  General and administrative expenses for the three months ended March 31,
     1997 include a one-time charge of $379,000 (5.8% of revenue) for costs 
     relating to the acquisition of TriQuest.

TOTAL REVENUE

Total revenue increased by 57.0% from $6.5 million for the three months ended 
March 31, 1997 to $10.2 million for the three months ended March 31, 1998. 
Sales through one distributor accounted for 17.3% and 15.8% of the Company's 
total revenue for the three months ended March 31, 1998 and 1997, 
respectively. Sales to CSC accounted for 31.2% of the Company's total revenue 
for the three month period ended March 31, 1998. Such revenue included $2.9 
million of Visual Testbench license sales made pursuant to the Company's 
contract with CSC. See "Overview." No customer accounted for more than 10% of 
the Company's total revenue for the three months ended March 31, 1997.

REVENUE

PRODUCT LICENSES

The Company's product licenses revenue is derived from license fees from the 
Company's HLDA Plus products and additionally from Design to Test products 
through June 30, 1997. Product licenses revenue increased by 65.5% from $4.9 
million for the three months ended March 31, 1997 to $8.1 million for the 
three months ended March 31, 1998.  Due to the sale of the TDS product line 
in July of 1997, revenue from HLDA Plus products accounted for 100% of 
product licenses revenue for the three months ended March 31, 1998. During 
the three months ended March 31, 1997, HLDA Plus and Design to Test revenues 
accounted for 77.7% and 22.3% of product license revenue, respectively.

                                       -11-
<PAGE>

HLDA license revenue increased 113% from $3.8 million for the three months 
ended March 31, 1997 to $8.1 million for the three months ended March 31, 
1998. The increase in HLDA license revenue over the same period in 1997 was 
primarily attributable to sales to a single customer, revenue from the 
Verification products portfolio that was not shipping in the comparable 
period in 1997, and growth in the installed base of HLDA customers. Sales to 
the single customer are expected to continue over the next seven quarters 
pursuant to contractual arrangements with the customer.(2)

MAINTENANCE AND SERVICES

The Company's maintenance and services revenue is derived from maintenance 
contracts related to the Company's HLDA products and training classes offered 
to purchasers of the Company's software products.  Maintenance and services 
revenue increased 37.9% from $1.5 million for the three months ended March 
31, 1997 to $2.0 million for the three months ended March 31, 1998. The 
increase is primarily attributable to maintenance contracts for verification 
products acquired in the SimTech acquisition, a maintenance contract with one 
customer, an increase in the installed base of HLDA Plus customers over the 
previous comparable period, less a decrease of Design to Test maintenance 
revenue of $743,000, due to the sale of the TDS product line.

OTHER

Other revenue consists of revenue from one-time technology sales and fees 
received for granting distribution rights. Other revenue decreased 35.2% from 
$142,000 for the three months ended March 31, 1997 to $92,000 for the three 
months ended March 31, 1998. In May 1997 a distribution agreement expired; 
and as a result the distribution rights fees paid at the inception of the 
agreement and amortized into revenue at $50,000 each quarter over the 
agreement period are no longer be a source of other revenue. No material 
costs were associated with other revenue for the three months ended  March 
31, 1998 and 1997.

COST OF REVENUE

PRODUCT LICENSES

Cost of product licenses revenue includes product packaging, software 
documentation, labor and other costs associated with handling, packaging and 
shipping product and other production related costs plus the amortization of 
purchased technology acquired in the SimTech purchase. The cost of product 
licenses revenue increased 50.3% from $185,000 for the three months ended 
March 31, 1997 to $278,000 for the three months ended March 31, 1998.  This 
increase is primarily attributable to approximately $86,000 in amortization 
of purchased technology included in the three months ended March 31, 1998 
relating to the purchase of SimTech in September of 1997. As a percentage of 
product licenses revenue, the cost of product licenses revenue decreased from 
3.8% of product license revenue for the three months ended March 31, 1997 to 
3.4% of product license revenue for the three months ended March 31, 1998.  
This decrease was primarily due to leveraging fixed costs across increased 
product license revenue.

MAINTENANCE AND SERVICES

Cost of maintenance and services revenue, which consists primarily of 
personnel costs for customer support and training classes offered to 
purchasers of the Company's products, increased 93.6% from $109,000 for the 
three months ended March 31, 1997 to $211,000 for the three months ended 
March 31, 1998.  As a percentage of maintenance and services revenue, the 
cost of maintenance and services revenue increased from 7.4% for the three 
months ended March 31, 1997 to 10.3% for the three months ended March 31, 
1998. The 2.9% increase in the cost of maintenance and services revenue as a 
percent of revenue for the three months ended March 31, 1998 over the same 
period in 1997 was primarily the result of the Company operating below 
forecasted staffing levels during the first half of 1997.  

- -----------------------
(2)  This statement is a forward-looking statement reflecting current 
     expectations. There can be no assurance that the Company's actual future 
     performance will meet the Company's current expectations. Investors are 
     strongly encouraged to review the section entitled "Additional Risk 
     Factors That Could Affect Operating Results and Market Price of Stock" 
     commencing on page 16 for a discussion of factors that could affect 
     future performance.

                                       -12-

<PAGE>

OPERATING EXPENSES

RESEARCH AND DEVELOPMENT

Research and development expenses consist of the engineering and operations 
support costs of developing new products and enhancements to existing 
products and performing quality assurance activities. Research and 
development expenses increased 63.7% from $1.4 million for the three months 
ended March 31, 1997 to $2.3 million for the three months ended March 31, 
1998. As a percentage of total revenue, research and development expenses 
increased from 22.0% for the three months ended March 31, 1997 to 23.0% for 
the three months ended March 31, 1998. The Company's research and development 
staff increased from 61 for the three months ended March 31, 1997 to 93 for 
the three months ended March 31, 1998. This increase is primarily 
attributable to the addition of 28 engineers through the acquisition of 
Simtech in September of 1997 and the hiring of 19 additional engineers, less 
a decrease of 15 engineers due to the sale of the TDS product line on in July 
of 1997.  The Company continues to believe that significant investment in 
research and development is required to remain competitive in its markets, 
and the Company therefore anticipates that research and development expense 
will increase in absolute dollars in future periods, but may vary as a 
percent of revenue. (2)

SALES AND MARKETING

Sales and marketing expenses, consisting primarily of salaries, commissions 
and promotional costs, increased 20.1% from $2.5 million for the three months 
ended March 31, 1997 to $3.0 million for the three months ended March 31, 
1998.  The increase over 1997 was attributable to expenses related to the 
marketing of new products acquired with the purchase of SimTech and 
additional commissions directly related to the increase in gross sales over 
the comparable period in 1997. As a percentage of total revenue, sales and 
marketing expenses decreased from 38.7% for the three months ended March 31, 
1997 to 29.6% for the three months ended March 31, 1998.  The decrease as a 
percentage of revenue was primarily attributable to the increase in total 
revenue for 1998. In the future, the Company expects sales and marketing 
expenses to continue to increase in absolute dollars.(2)

GENERAL AND ADMINISTRATIVE

General and administrative expenses consist primarily of the corporate, 
finance, human resource, information services, administrative, and legal and 
accounting expenses of the Company.  General and administrative expenses 
decreased 7.1% from $1.2 million for the three months ended March 31, 1997 
which includes a $379,000 one-time charge for costs associated with the 
acquisition of TriQuest, to $1.1 million for the three months ended March 31, 
1998.  Excluding this one-time charge, expenses increased by $295,000 (36.9%) 
for the three months ended March 31, 1998 as compared to the same period in 
the prior year.  As a percentage of total revenue, excluding the one time 
charge for costs associated with the acquisition of TriQuest, general and 
administrative expenses decreased from 12.3% for the three months ended March 
31, 1997 to 10.7% for the three months ended March 31, 1998.  The decrease as 
a percentage of total revenue was attributable to the 

- -----------------
(2) This statement is a forward-looking statement reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations.  Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
page 16 for a discussion of factors that could affect future performance.

                                       -13-
<PAGE>

increase in total revenue in 1998.  The Company expects general and 
administrative expenses to increase in absolute dollars to support future 
sales and operations.(2)

INTEREST EXPENSE

Interest expense decreased from $7,000 for the three months ended March 31, 
1997 to $1,000 for the three months ended March 31, 1998 due to decreased 
long term debt and capital leases obligations. The Company incurred no 
interest expense associated with the Company's bank line of credit for the 
three months ended March 31, 1998.

OTHER INCOME, NET

Other income consists of interest income associated with available cash 
balances, gains or losses from the sale of property and equipment, the 
Company's pro rata share of the earnings and losses of  Summit Asia and 
foreign exchange rate differences resulting from paying operating expenses of 
foreign operations in the local currency.  Other income was  $218,000 for the 
three months ended March 31, 1997 and $289,000 for the three months ended 
March 31, 1998.  The increase in other income was primarily due to increased 
interest earned on the Company's cash holdings.

INCOME TAX PROVISION

The income tax provision increased from $80,000 for the three months ended 
March 31, 1997 to $945,000 for the three months ended March 31, 1998. The 
provision for the three months ended March 31, 1997 reflects an effective 
rate of 6.5% of taxable income and is comprised of federal alternative 
minimum tax and Israeli income taxes. In the first quarter of 1997, the 
Company utilized net operating loss carryforwards to offset a considerable 
portion of U.S. federal and state taxable income. The 1998 income tax 
provision reflects the Company's estimated consolidated tax rate for federal, 
state and foreign taxes of approximately 28% of taxable income. The 
difference between the Company's estimated effective rate and the statutory 
rate for the year ending December 31, 1998 is primarily due to reduced tax 
rates on the Company's income generated from operations in Israel.

VARIABILITY OF OPERATING RESULTS

The Company has experienced significant quarterly fluctuations in operating 
results and cash flows and it is likely that these fluctuations will continue 
in future periods.  These fluctuations have been, and may in the future be, 
caused by a number of factors, including the rate of acceptance of new 
products, corporate acquisitions and consolidations, product, customer and 
channel mix, the size and timing of orders, lengthy sales cycles, the timing 
of new product announcements and introductions by the Company and its 
competitors, seasonal factors, rescheduling or cancellation of customer 
orders, the Company's ability to continue to develop and introduce new 
products and product enhancements on a timely basis, the level of 
competition, purchasing and payment patterns, pricing policies of the Company 
and its competitors, product quality issues, currency fluctuations and 
general economic conditions.

The Company has generally recognized a substantial portion of its revenue in 
the last month of each quarter, with this revenue concentrated in the latter 
part of the month.  Any significant deferral of purchases of the Company's 
products could have a material adverse effect on the Company's business, 
financial condition and results of operations in any particular quarter, and 
to the extent that significant sales occur earlier than expected, operating 
results for subsequent quarters may be adversely affected. The Company's 
revenue is difficult to forecast for several reasons. The market for certain 
of the Company's software products is evolving. The Company's sales cycle is 
typically six to nine months and varies substantially from customer to 
customer.  In addition, a significant portion of the Company's sales are made 
through indirect channels and can be harder to predict. The Company 
establishes its expenditure levels for product development, sales and 


- -----------------
(2) This statement is a forward-looking statement reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations.  Investors are 
strongly encouraged to review the section entitled "Additional Risk  Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
page 16 for a discussion of factors that could affect future performance. 

                                       -14-
<PAGE>

marketing and other operating activities based primarily on its expectations 
as to future revenue. As a result, if revenue in any quarter falls below 
expectations, expenditure levels could be disproportionately high as a 
percentage of revenue, and the Company's operating results for that quarter 
would be adversely affected. Based upon the factors described above, the 
Company believes that its quarterly revenue, expenses and operating results 
are likely to vary significantly in the future, that period-to-period 
comparisons of its results of operations are not necessarily meaningful and 
that, as a result, such comparisons should not be relied upon as indications 
of the Company's future performance. Moreover, although the Company's revenue 
has increased in recent periods, there can be no assurance that the Company's 
revenue will grow in future periods or that the Company will remain 
profitable on a quarterly or annual basis. Due to the foregoing or other 
factors, it is likely that the Company's results of operations may be below 
investors' and market analysts' expectations in some future quarters, which 
could have a severe adverse effect on the market price of the Company's 
Common Stock.

EFFECTIVE CORPORATE TAX RATES

Prior to 1996, the Company had experienced losses for income tax purposes in 
the United States.  The Company is now profitable in the United States and 
expects to pay income taxes at or near the statutory tax rate on its U.S. 
taxable earnings.  As of December 31, 1997, the Company has recognized the 
benefit of its U.S. net operating loss carryforwards and tax credit 
carryforwards in their financial statements.

The Company's Israeli operations are performed entirely by Summit Design 
(EDA) Ltd., which is a separate taxable Israeli entity.  The Company's 
existing Israeli production facility has been granted "Approved Enterprise" 
status under the Israeli Investment Law, which entitles the Company to 
reductions in the tax rate normally applicable to Israeli companies with 
respect to the income generated by its "Approved Enterprise" programs.  In 
particular, the tax holiday covers the seven year period beginning the first 
year in which Summit Design (EDA) Ltd. generates taxable income from its 
"Approved Enterprise" (after using any available NOLs), provided that such 
benefits will terminate in 2006 regardless of whether the seven year period 
has expired.  The tax holiday provides that, during such seven year periods, 
a portion of the Company's taxable income from its Israeli operations will be 
taxed at favorable tax rates. The Company has recently applied for "Approved 
Enterprise" status with respect to a new project and intends to apply in the 
future with respect to additional projects.  There can be no assurance that 
the Company will be granted any approvals and therefore there can be no 
assurance the Company will continue to have favorable tax status in Israel.  
Management of the Company intends to permanently reinvest earnings of the 
Israeli subsidiary outside the U.S.  If such earnings were remitted to the 
U.S., additional U.S. federal and foreign taxes may be due. 

The Company has foreign income tax net operating losses of approximately $5.6 
million at December 31, 1997.  These foreign losses were generated in Israel 
over several years and have not yet received final assessment from the 
Israeli government.  Consequently, management is uncertain as to the 
availability of a substantial portion of such foreign loss carryforwards.

The Company is also subject to risk that United States and foreign tax laws 
and rates may change in a future period or periods, and that any such changes 
may materially adversely affect the Company's tax rate.  As a result of the 
factors described above and other related factors, there can be no assurance 
that the Company will maintain a favorable tax rate in future periods.  Any 
increase in the Company's effective tax rate, or variations in the effective 
tax rate from period to period, could have a material adverse effect on the 
Company's business, financial condition, results of operations and cash flows.

                                       -15-
<PAGE>

LIQUIDITY AND CAPITAL RESOURCES

The Company has financed its operations primarily through a public offering 
in 1996 the private placement of capital stock, as well as capital equipment 
leases, borrowings under its bank line of credit, Israeli research and 
development grants and cash generated from operations.  As of March 31, 1998, 
the Company had approximately $20.4 million in cash and cash equivalents and 
a $1.0 million bank line of credit with a major financial institution (the 
"Bank"). The line of credit expires on April 30, 1999. Borrowings thereunder 
accrue interest at specified percentages above the prime lending rate based 
on the Company's ratio of debt to tangible net worth. Advances under the line 
of credit are limited to a specified percentage of eligible accounts 
receivable (as defined in the line of credit). Borrowings under the line of 
credit are collateralized by the Company's accounts receivable, inventory and 
general intangible assets, including its intellectual property rights. As of 
March 31, 1998, the Company had no borrowings outstanding under this line of 
credit.

As of March 31, 1998, the Company had working capital of approximately $15.7 
million.

Net cash generated by operating activities was approximately $2.6 million and 
$505,000 for the three months ended March 31, 1998 and 1997, respectively. 
Cash generated by operating activities resulted primarily from profitable 
operations and improved cash collections less the decrease in deferred 
revenue and accrued liabilities for the three months ended March 31, 1998 and 
primarily from profitable operations less a decrease in deferred revenue for 
the three months ended March 31, 1997. 

Net cash used in investing activities was approximately $573,000 and $326,000 
for the three months ended March 31, 1998 and 1997, respectively. Net cash 
used in investing activities was related to the acquisition of furniture and 
equipment and a loan to an independent software company for the three months 
ended March 31, 1998 and the acquisition of furniture and equipment and a 
loan to an employee for the three months ended March 31, 1997.

Net cash used by financing activities was approximately $1.6 million and 
$92,000 for the three months ended March 31, 1998 and 1997, respectively.  
For the three months ended March 31, 1998 the use of cash was primarily from 
repurchasing 162,500 shares of the Company's common stock, less proceeds from 
the issuance of common stock and a tax benefit from option exercises.  For 
the three months ended March 31, 1997, the use of cash was primarily for 
repayment of debt and capital lease obligations.

The Company presently believes that its current cash and cash equivalent, 
together with funds expected to be generated from operations, will satisfy 
the Company's anticipated working capital and other cash requirements for at 
least the next 12 months.(2)

ADDITIONAL RISK FACTORS THAT COULD AFFECT OPERATING RESULTS AND MARKET PRICE OF
STOCK

HISTORY OF OPERATING LOSSES; FLUCTUATIONS IN QUARTERLY RESULTS

While the Company generated net income in the first quarter of 1998,there can 
be no assurance that the Company will be profitable in the future. In 
addition, the Company has experienced significant quarterly fluctuations in 
operating results and cash flows and it is likely that these fluctuations 
will continue in future periods. These fluctuations have been, and may in the 
future be, caused by a number of factors, including the rate of acceptance of 
new products, corporate acquisitions and consolidations, product, customer 
and channel mix, the size and timing of orders, lengthy sales cycles, the 
timing of new product announcements and 

- -------------------
(2) This statement is a forward-looking statement reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations.  Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
this page for a discussion of factors that could affect future 
performance.

                                       -16-
<PAGE>

introductions by the Company and its competitors, seasonal factors, 
rescheduling or cancellation of customer orders, the Company's ability to 
continue to develop and introduce new products and product enhancements on a 
timely basis, the level of competition, purchasing and payment patterns, 
pricing policies of the Company and its competitors, product quality issues, 
currency fluctuations and general economic conditions.

The Company has generally recognized a substantial portion of its revenue in 
the last month of each quarter, with this revenue concentrated in the latter 
part of the month.  Any significant deferral of purchases of the Company's 
products could have a material adverse effect on the Company's business, 
financial condition, results of operations or cash flows in any particular 
quarter, and to the extent that significant sales occur earlier than 
expected, operating results for subsequent quarters may be adversely 
affected. The Company's revenue is difficult to forecast for several reasons. 
The market for certain of the Company's software products is evolving. The 
Company's sales cycle is typically six to nine months and varies 
substantially from customer to customer. The Company operates with little 
product backlog because its products are typically shipped shortly after 
orders are received. In addition, a significant portion of the Company's 
sales are made through indirect channels and can be harder to predict. The 
Company establishes its expenditure levels for product development, sales and 
marketing and other operating activities based primarily on its expectations 
as to future revenue. As a result, if revenue in any quarter falls below 
expectations, expenditure levels could be disproportionately high as a 
percentage of revenue, and the Company's operating results for that quarter 
would be adversely affected. Based upon the factors described above, the 
Company believes that its quarterly revenue, expenses and operating results 
are likely to vary significantly in the future, that period-to-period 
comparisons of its results of operations are not necessarily meaningful and 
that, as a result, such comparisons should not be relied upon as indications 
of the Company's future performance. Moreover, although the Company's revenue 
has increased in recent periods, there can be no assurance that the Company's 
revenue will grow in future periods or that the Company will remain 
profitable on a quarterly or annual basis. Due to the foregoing or other 
factors, it is likely that the Company's results of operations may be below 
investors' and market analysts' expectations in some future quarters, which 
could have a severe adverse effect on the market price of the Company's 
Common Stock.

PRODUCT CONCENTRATION; UNCERTAINTY OF MARKET ACCEPTANCE OF HLDA 

Prior to July 1997, the Company's revenue was predominantly derived from two 
product lines, Visual HDL, which includes Visual HDL for VHDL and Visual HDL 
for Verilog, and TDS.  Effective July 1, 1997, as a result of the Asset Sale, 
TDS products ceased to be a source of revenue.  With the acquisition of 
TriQuest in February 1997 and SimTech in September 1997, the Company also 
derives revenue from verification products which include hardware-software 
co-verification, code coverage, and HDL debugging products as well as 
analysis, verification and RTL optimization tools.

The Company believes that HLDA products will continue to account for 
substantially all of its revenue in the future. As a result, factors 
adversely affecting sales of these products, including increased competition, 
inability to successfully introduce enhanced or improved versions of these 
products, product quality issues and technological change, could have a 
material adverse effect on the Company's business, financial condition and 
results of operations.

The Company's future success depends primarily upon the market acceptance of 
its existing and future HLDA products. The Company commercially shipped its 
first HLDA product, Visual HDL for VHDL, in the first quarter of 1994. For 
the years ended December 31, 1997, 1996 and 1995, respectively, revenue from 
HLDA products and related maintenance contracts represented 76.5%, 63.5%, and 
43.6%, respectively, of the Company's total revenue. The Company's HLDA 
products incorporate certain unique design methodologies and thus represent a 
departure from industry standards for design creation and verification. The 
Company believes that broad market acceptance of its HLDA products will 
depend on several factors, including the ability to significantly enhance 
design productivity, ease of use, interoperability with existing EDA tools, 
price and the customer's assessment of the Company's financial resources and 
its technical, managerial, service and support expertise. The Company also 
depends on its distributors to assist the Company in gaining market 
acceptance of its products. There can be no assurance that sufficient 
priority will be given by the 

                                       -17-
<PAGE>

Company's distributors to marketing the Company's products or whether such 
distributors will continue to offer the Company's products. There can be no 
assurance that the Company's HLDA products will achieve broad market 
acceptance. A decline in the demand for, or the failure to achieve broad 
market acceptance of, the Company's HLDA products will have a material 
adverse effect on the Company's business, financial condition, results of 
operations or cash flows.

Although demand for HLDA products has increased in recent years, the market 
for HLDA products is still emerging and there can be no assurance that it 
will continue to grow or that, even if the market does grow, businesses will 
continue to purchase the Company's HLDA products. If the market for HLDA 
products fails to grow or grows more slowly than the Company currently 
anticipates, the Company's business, financial condition, results of 
operations or cash flows would be materially adversely affected.

Traditionally, EDA customers have been risk averse in accepting new design 
methodologies. Because many of Summit's tools embody new design 
methodologies, this risk aversion on the part of potential customers presents 
an ongoing marketing and sales challenge to the Company and makes the 
introduction and acceptance of new products unpredictable. The Company's 
Visual Testbench product, introduced in the fourth quarter of 1995, provides 
a new methodology and requires a change in the traditional design flow for 
creating IC test programs. The Company anticipates a lengthy period of test 
marketing for the Visual Testbench product. Accordingly, the Company cannot 
predict the extent, to which it will realize revenue from Visual Testbench in 
excess of the revenue expected to be received pursuant to an OEM agreement 
entered into in July 1997. As part of this agreement, CSC must purchase a 
minimum of $16.0 million of Visual Testbench licenses over a thirty month 
period beginning in July 1997. As of March 31, 1998 the Company had sold $9.1 
million of Visual Testbench licenses pursuant to this agreement. The Company 
will need to replace this revenue when the $16.0 million purchase obligation 
is satisfied and the failure of the Company to replace this revenue would 
have a material adverse affect on the Company's operating results.

COMPETITION

The EDA industry is highly competitive and the Company expects competition to 
increase as other EDA companies introduce HLDA products.  In the HLDA market, 
the Company principally competes with Mentor Graphics and a number of smaller 
firms. Indirectly, the Company also competes with other firms that offer 
alternatives to HLDA and could potentially offer more directly competitive 
products in the future. Certain of these companies have significantly greater 
financial, technical and marketing resources and larger installed customer 
bases than the Company. Some of the Company's current and future competitors 
offer a more complete range of EDA products and may distribute products that 
directly compete with the Company's HLDA products by bundling such products 
with their core product line. In addition, the Company's products perform a 
variety of functions, certain of which are, and in the future may be, offered 
as separate products or discrete point solutions by the Company's existing 
and future competitors. For example, certain companies currently offer design 
entry products without simulators. There can be no assurance that such 
competition will not cause the Company to offer point solutions instead of, 
or in addition to, the Company's current software products. Such point 
solutions would be priced lower than the Company's current product offerings 
and could cause the Company's average selling prices to decrease, which could 
have a material adverse effect on the Company's business, financial 
condition, results of operations, or cash flows.

The Company competes on the basis of certain factors including product 
capabilities, product performance, price, support of industry standards, ease 
of use, first to market and customer technical support and service. The 
Company believes that it competes favorably overall with respect to these 
factors. However, in particular cases, the Company's competitors may offer 
HLDA products with functionality which is sought by the Company's prospective 
customers and which differs from that offered by the Company. In addition, 
certain competitors may achieve a marketing advantage by establishing formal 
alliances with other EDA vendors. Further, the EDA industry in general has 
experienced significant consolidation in recent years, and the acquisition of 
one of the Company's competitors by a larger, more established EDA vendor 
could create a more significant competitor. There can be no assurance that 
the Company will be able to compete successfully against current and future 
competitors or that competitive pressures faced by the Company will not have 
a material adverse effect on its business, financial condition, results of 
operations, or cash flows. 

                                       -18-
<PAGE>

There can be no assurance that the Company's current and future competitors 
will not be able to develop products comparable or superior to those 
developed by the Company or to adapt more quickly than the Company to new 
technologies, evolving industry trends or customer requirements. Increased 
competition could result in price reductions, reduced margins and loss of 
market share, all of which could have a material adverse effect on the 
Company's business, financial condition, results of operations or cash flows.

DEPENDENCE ON ELECTRONICS INDUSTRY MARKET

Because the electronics industry is characterized by rapid technological 
change, short product life cycles, fluctuations in manufacturing capacity and 
pricing and margin pressures, certain segments, including the computer, 
semiconductor, semiconductor test equipment and telecommunications 
industries, have experienced sudden and unexpected economic downturns. During 
these periods, capital spending is commonly curtailed and the number of 
design projects often decreases. Because the Company's sales are dependent 
upon capital spending trends and new design projects, negative factors 
affecting the electronics industry could have a material adverse effect on 
the Company's business, financial condition, results of operations, or cash 
flows. A number of electronics companies, including customers of the Company, 
have recently experienced a slowdown in their businesses. The Company's 
future operating results may reflect substantial fluctuations from period to 
period as a consequence of such industry patterns, general economic 
conditions affecting the timing of orders from customers and other factors.

DEPENDENCE ON THIRD PARTIES FOR PRODUCT INTEROPERABILITY

Because the Company's products must interoperate with EDA products of other 
companies, particularly simulation and synthesis products, the Company must 
have timely access to third party software to perform development and testing 
of its products. Although the Company has established relationships with a 
variety of EDA vendors to gain early access to new product information, these 
relationships may be terminated by either party with limited notice. In 
addition, such relationships are with companies that are current or potential 
future competitors of the Company, including Synopsys, Mentor Graphics and 
Cadence. If any of these relationships were terminated and the Company was 
unable to obtain, in a timely manner, information regarding modifications of 
third party products necessary for modifying its software products to 
interoperate with these third party products, the Company could experience a 
significant increase in development costs, the development process would take 
longer, product introductions would be delayed and the Company's business, 
financial condition, results of operations or cash flows could be materially 
adversely affected.

NEW PRODUCTS AND TECHNOLOGICAL CHANGE; EVOLVING INDUSTRY STANDARDS

The EDA industry is characterized by extremely rapid technological change, 
frequent new product introductions and evolving industry standards. The 
introduction of products embodying new technologies and the emergence of new 
industry standards can render existing products obsolete and unmarketable. In 
addition, customers in the EDA industry require software products that allow 
them to reduce time to market, differentiate their products, improve their 
engineering productivity and reduce their design errors. The Company's future 
success will depend upon its ability to enhance its current products, develop 
and introduce new products that keep pace with technological developments and 
emerging industry standards and address the increasingly sophisticated needs 
of its customers. There can be no assurance that the Company will be 
successful in developing and marketing product enhancements or new products 
that respond to technological change or emerging industry standards, that the 
Company will not experience difficulties that could delay or prevent the 
successful development, introduction and marketing of these products, or that 
its new products will adequately meet the requirements of the marketplace and 
achieve market acceptance.  If the Company is unable, for technological or 
other reasons, to develop and introduce products in a timely manner in 
response to changing market conditions, industry standards or other customer 
requirements, particularly if such product releases have been pre-announced, 
the Company's business, financial condition, results of operations or cash 
flows will be materially adversely affected.

Software products as complex as those offered by the Company may contain 
errors that may be detected at any point in the products' life cycles. The 
Company has in the past discovered software errors in certain of its 

                                       -19-
<PAGE>

products and has experienced delays in shipment of products during the period 
required to correct these errors. There can be no assurance that, despite 
testing by the Company and by current and potential customers, errors will 
not be found, resulting in loss of, or delay in, market acceptance and sales, 
diversion of development resources, injury to the Company's reputation or 
increased service and warranty costs, any of which could have a material 
adverse effect on the Company's business, financial condition, results of 
operations or cash flows.

DEPENDENCE ON DISTRIBUTORS

The Company relies on distributors for licensing and support of its products 
outside of North America. Approximately 24%, 56%, 29%, 46% and 42% of the 
Company's revenue for the three months ended March 31, 1998 and 1997 and the 
years ended December 31, 1997, 1996 and 1995, respectively, were attributable 
to sales made through distributors. The Company has also entered into a joint 
venture with Anam pursuant to which the joint venture corporation Summit Asia 
acquired exclusive rights to sell, distribute and support all of the 
Company's products in the Asia-Pacific region, excluding Japan.  Summit Asia 
has acted in such capacity since April 1, 1996. Prior to that date, Anam was 
an independent distributor of the Company's products. The Company is 
currently restructuring the ownership and responsibilities of Summit Asia.  
There can be no assurance that any restructuring would result in Summit Asia 
becoming profitable or that revenue attributable to sales in the Asia Pacific 
region, excluding Japan, would increase. During the first quarter of 1997, 
the Company entered into a distribution agreement with ATE pursuant to which 
ATE was granted exclusive rights to sell, distribute and support Summit's 
Visual Testbench products within Japan until October 1998, subject to the 
Company's ability to terminate the relationship if ATE fails to meet 
quarterly sales objectives. The agreement may also be terminated by either 
party for breach. In addition, in the first quarter of 1996, the Company 
entered into a three-year, exclusive distribution agreement for its HLDA 
products in Japan with Seiko.  In the event Seiko fails to meet specified 
quotas for two or more quarterly periods, exclusivity can be terminated by 
Summit, subject to Seiko's right to pay a specified fee to maintain 
exclusivity. The agreement is renewable for successive five-year terms by 
mutual agreement of the Company and Seiko and is terminable by either party 
for breach. In March 1997, the Company entered into a three-year distribution 
agreement with Kanematsu USA Inc. pursuant to which Kanematsu was granted 
exclusive distribution rights to sell, distribute and support certain 
verification products in Japan.  For the three months ended March 31, 1998 
and the year ended December 31, 1997, all sales of the Company's products in 
the Asia-Pacific region were through Seiko, Summit Asia, ATE and Kanematsu.

There can be no assurance the relationships with Seiko, Summit Asia, ATE and 
Kanematsu will be effective in maintaining or increasing sales relative to 
the levels experienced prior to such relationships. The Company also has 
independent distributors in Europe and is dependent on the continued 
viability and financial stability of its distributors. Since the Company's 
products are used by skilled design engineers, distributors must possess 
sufficient technical, marketing and sales resources and must devote these 
resources to a lengthy sales cycle, customer training and product service and 
support. Only a limited number of distributors possess these resources. In 
addition, Seiko, Summit Asia, ATE and Kanematsu, as well as the Company's 
other distributors, may offer products of several different companies, 
including competitors of the Company. There can be no assurance that the 
Company's current distributors will continue to market or service and support 
the Company's products effectively, that any distributor will continue to 
sell the Company's products or that the distributors will not devote greater 
resources to products of other companies. The loss of, or a significant 
reduction in, revenue from the Company's distributors could have a material 
adverse effect on the Company's business, financial condition, results of 
operations or cash flows.

INTERNATIONAL SALES AND OPERATIONS

Approximately 32%, 53%, 33%, 50% and 52% of the Company's revenue for the 
three months ended March 31, 1998 and 1997 and the years ended December 31, 
1997, 1996 and 1995, respectively, were attributable to sales made outside 
the United States. The Company expects that international revenue will 
continue to represent a significant portion of its total revenue. The 
Company's international revenue is currently denominated in U.S. dollars. As 
a result, increases in the value of the U.S. dollar relative to foreign 
currencies could make the Company's products more expensive and, therefore, 
potentially less competitive in those 

                                       -20-
<PAGE>

markets. The Company pays the expenses of its international operations in 
local currencies and does not engage in hedging transactions with respect to 
such obligations. International sales and operations are subject to numerous 
risks, including tariff regulations and other trade barriers, requirements 
for licenses, particularly with respect to the export of certain 
technologies, collectability of accounts receivable, changes in regulatory 
requirements, difficulties in staffing and managing foreign operations and 
extended payment terms. There can be no assurance that such factors will not 
have a material adverse effect on the Company's future international sales 
and operations and, consequently, on the Company's business, financial 
condition, results of operations or cash flows. In addition, financial 
markets and economics in the Asia Pacific Region have been experiencing 
adverse conditions which could adversely affect demand for the Company's 
products in such region.

In order to successfully expand international sales, the Company may need to 
establish additional foreign operations, hire additional personnel and 
recruit additional international distributors. This will require significant 
management attention and financial resources and could adversely affect the 
Company's operating margins. In addition, to the extent that the Company is 
unable to effect these additions in a timely manner, the Company's growth, if 
any, in international sales will be limited. There can be no assurance that 
the Company will be able to maintain or increase international sales of the 
Company's products, and failure to do so could have a material adverse effect 
on the Company's business, financial condition, results of operations or cash 
flows.

MANAGEMENT OF GROWTH AND ACQUISITIONS

Summit's ability to achieve significant growth will require it to implement 
and continually expand its operational and financial systems, recruit 
additional employees and train and manage current and future employees.  
Summit expects any such growth will place a significant strain on its 
operational resources and systems.  Failure effectively to manage any such 
growth would have a material adverse effect on Summit's business, financial 
condition, results of operations or cash flows.

On February 28, 1997, Summit completed its acquisition of TriQuest and on 
September 9, 1997, Summit completed its acquisition of SimTech.  As a result 
of these acquisitions, Summit's operating expenses are expected to increase.  
There can be no assurance that the integration of TriQuest's and SimTech's 
business can be successfully completed in a timely fashion, or at all, or 
that the revenues from TriQuest and SimTech will be sufficient to support the 
costs associated with the acquired businesses, without adversely affecting 
Summit's operating margins.  Any failure to successfully complete the 
integration in a timely fashion or to generate sufficient revenues from the 
acquired business could have a material adverse effect on Summit's business, 
financial condition, results of operations or cash flows.  In addition, 
Summit regularly evaluates acquisition opportunities.  Future acquisitions by 
Summit could result in potentially dilutive issuances of equity securities, 
the incurrence of debt and contingent liabilities and amortization expenses 
related to goodwill and other intangible assets, which could materially 
adversely affect Summit's results of operations.  Product and technology 
acquisitions entail numerous risks, including difficulties in the 
assimilation of acquired operations, technologies and products, diversion of 
management's attention to other business concern, risks of entering markets 
in which Summit has no or limited prior experience and potential loss of key 
employees of acquired companies.  Summit's management has had limited 
experience in assimilating acquired organizations and products into Summit's 
operations.  No assurance can be given as to the ability of Summit to 
integrate successfully any operations, personnel or products that have been 
acquired or that might be acquired in the future, and the failure of Summit 
to do so could have a material adverse effect on Summit's results of 
operations.

OPERATIONS IN ISRAEL

The Company's research and development operations related to its HLDA 
products are located in Israel and may be affected by economic, political and 
military conditions in that country. Accordingly, the Company's business, 
financial condition and results of operations could be materially adversely 
affected if hostilities involving Israel should occur. This risk is 
heightened due to the restrictions on the Company's ability to manufacture or 
transfer outside of Israel any technology developed under research and 
development grants 

                                       -21-
<PAGE>

from the government of Israel as described in "--Israeli Research, 
Development and Marketing Grants." In addition, while all of the Company's 
sales are denominated in U.S. dollars, a portion of the Company's annual 
costs and expenses in Israel are paid in Israeli currency. These costs and 
expenses were approximately $4.7, $4.3 and $4.3 million in 1997, 1996 and 
1995, respectively. Payment in Israeli currency subjects the Company to 
foreign currency fluctuations and to economic pressures resulting from 
Israel's generally high rate of inflation, which has been approximately 7%, 
11% and 8% during 1997, 1996, and 1995, respectively. The Company's primary 
expense which is paid in Israeli currency is employee salaries for research 
and development activities. As a result, an increase in the value of Israeli 
currency in comparison to the U.S. dollar could increase the cost of research 
and development expenses and general and administrative expenses. There can 
be no assurance that currency fluctuations, changes in the rate of inflation 
in Israel or any of the other aforementioned factors will not have a material 
adverse effect on the Company's business, financial condition, results of 
operations, or cash flows. In addition, coordination with and management of 
the Israeli operations requires the Company to address differences in 
culture, regulations and time zones. Failure to successfully address these 
differences could be disruptive to the Company's operations.

The Company's Israeli production facility has been granted the status of an 
"Approved Enterprise" under the Israeli Investment Law for the Encouragement 
of Capital Investments, 1959 (the Investment Law). Taxable income of a 
company derived from an "Approved Enterprise" is eligible for certain tax 
benefits, including significant income tax rate reductions for up to seven 
years following the first year in which the "Approved Enterprise" has Israeli 
taxable income (after using any available net operating losses). The period 
of benefits cannot extend beyond 12 years from the year of commencement of 
operations or 14 years from the year in which approval was granted, whichever 
is earlier. The tax benefits derived from a certificate of approval for an 
"Approved Enterprise" relate only to taxable income attributable to such 
"Approved Enterprise" and are conditioned upon fulfillment of the conditions 
stipulated by the Investment Law, the regulations promulgated thereunder and 
the criteria set forth in the certificate of approval. In the event of a 
failure by the Company to comply with these conditions, the tax benefits 
could be canceled, in whole or in part, and the Company would be required to 
refund the amount of the canceled benefits, adjusted for inflation and 
interest. There can be no assurance that the Company's Israeli production 
facility will continue to operate or qualify as an "Approved Enterprise" or 
that the benefits under the "Approved Enterprise" regulations will continue, 
or be applicable, in the future. The loss of, or any material decrease in, 
these income tax benefits could have a material adverse effect on the 
Company's business, financial condition, results of operations or cash flows. 

DEPENDENCE ON KEY PERSONNEL

The Company's future success depends in large part on the continued service 
of its key technical and management personnel and its ability to continue to 
attract and retain highly-skilled technical, sales and marketing and 
management personnel. The Company has entered into employment agreements with 
certain of its executive officers, however, such agreements do not guarantee 
the services of these employees and do not contain non-competition 
provisions. Competition for personnel in the software industry in general, 
and the EDA industry in particular, is intense, and the Company has at times 
in the past experienced difficulty in recruiting qualified personnel. There 
can be no assurance that the Company will retain its key personnel or that it 
will be successful in attracting and retaining other qualified technical, 
sales and marketing and management personnel in the future. The loss of any 
key employees or the inability to attract and retain additional qualified 
personnel may have a material adverse effect on the Company's business, 
financial condition, results of operations or cash flows. The Company has 
obtained a $1 million key person life insurance policy on its 
President/Chief Executive Officer. The Company recently hired a new Vice 
President of Worldwide Marketing and Sales and several new sales persons. The 
Company's future success will depend in part on the ability of these new 
persons to rapidly and effectively transition into their new positions. 
Additions of new personnel and departures of existing personnel, particularly 
in key positions, can be disruptive and can result in departures of 
additional personnel, which could have a material adverse effect on the 
Company's business, financial condition, results of operations or cash flows. 

                                       -22-
<PAGE>

ISRAELI RESEARCH, DEVELOPMENT AND MARKETING GRANTS

Summit's Israeli subsidiary obtained research and development grants from the 
Office of the Chief Scientist (the "Chief Scientist") in the Israeli Ministry 
of Industry and Trade of approximately $232,000 and $608,000 in 1993 and 
1995, respectively. As of December 31, 1997, all amounts had been repaid. The 
terms of the grants prohibit the manufacture of products developed under 
these grants outside of Israel and the transfer of the technology developed 
pursuant to these grants to any person, without the prior written consent of 
the Chief Scientist. The Company's Visual HDL for VHDL products have been 
developed under grants from the Chief Scientist and thus are subject to these 
restrictions. If the Company is unable to obtain the consent of the 
government of Israel, the Company would be unable to take advantage of 
potential economic benefits such as lower taxes, lower labor and other 
manufacturing costs and advanced research and development facilities that may 
be available if such technology and manufacturing operations could be 
transferred to locations outside of Israel. In addition, the Company would be 
unable to minimize risks particular to operations in Israel, such as 
hostilities involving Israel.  Although the Company is eligible to apply for 
additional grants from the Chief Scientist, it has no present plans to do so. 
The Company received a Marketing Fund Grant from the Israeli Ministry of 
Industry and Trade for an aggregate of $423,000. The grant must be repaid at 
the rate of 3% of the increase in exports over the 1993 export level of all 
Israeli products, until repaid. As of March 31, 1998, approximately $261,000 
was outstanding under the grant.

LIMITATIONS ON PROTECTION OF INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS

The Company's success depends in part upon its proprietary technology. The 
Company relies on a combination of copyright, trademark and trade secret 
laws, confidentiality procedures, licensing arrangements and technical means 
to establish and protect its proprietary rights. As part of its 
confidentiality procedures, the Company generally enters into non-disclosure 
agreements with its employees, distributors and corporate partners, and 
limits access to, and distribution of, its software, documentation and other 
proprietary information. In addition, the Company's products are protected by 
hardware locks and software encryption techniques designed to deter 
unauthorized use and copying. Despite these precautions, it may be possible 
for a third party to copy or otherwise obtain and use the Company's products 
or technology without authorization, or to develop similar technology 
independently.

The Company provides its HLDA Plus products to end-users primarily under 
"shrink-wrap" license agreements included within the packaged software In 
addition, the Company delivers certain of its verification products 
electronically under an electronic version of a "shrink wrap" license 
agreement. These agreements are not negotiated with or signed by the 
licensee, and thus may not be enforceable in certain jurisdictions.  In 
addition, the laws of some foreign countries do not protect the Company's 
proprietary rights as fully as do the laws of the United States. There can be 
no assurance that the Company's means of protecting its proprietary rights in 
the United States or abroad will be adequate or that competitors will not 
independently develop similar technology.

The Company could be increasingly subject to infringement claims as the 
number of products and competitors in the Company's industry segment grows, 
the functionality of products in its industry segment overlaps and an 
increasing number of software patents are granted by the United States Patent 
and Trademark Office. There can be no assurance that a third party will not 
claim such infringement by the Company with respect to current or future 
products. Any such claims, with or without merit, could be time-consuming, 
result in costly litigation, cause product delays or require the Company to 
enter into royalty or licensing agreements. Such royalty or license 
agreements, if required, may not be available on terms acceptable to the 
Company or at all. Failure to protect its proprietary rights or claims of 
infringement could have a material adverse effect on the Company's business, 
financial condition, results of operations or cash flows.

POSSIBLE VOLATILITY OF STOCK PRICE

The stock markets have experienced price and volume fluctuations that have 
particularly affected technology companies, resulting in changes in the 
market prices of the stocks of many companies which may not have been 
directly related to the operating performance of those companies. Such broad 
market fluctuations may 

                                       -23-
<PAGE>

adversely affect the market price of the Common Stock.  In addition, factors 
such as announcements of technological innovations or new products by the 
Company or its competitors, market conditions in the computer software or 
hardware industries and quarterly fluctuations in the Company's operating 
results may have a significant adverse effect on the market price of the 
Company's Common Stock.

YEAR 2000

The Company is currently reviewing its products, internal systems and 
infrastructure in order to identify and modify those products and systems 
that are not Year 2000 compliant. The Company expects any required 
modification to be made on a timely basis and does not believe that the cost 
of any such modification will have a material adverse affect on the Company's 
operating results. There can be no assurance, however, that there will not be 
a delay in, or increased costs associated with, implementation of any such 
modifications and the Company's inability to implement such modifications 
could have an adverse effect on the Company's future operating results.


                                       -24-
<PAGE>

PART II

Item 1.   Legal Proceedings

          Not applicable

Item 2.   Changes in Securities

          From January 1, 1998 to March 31, 1998 the Company issued and sold 
          22,142 shares of Common Stock that were not registered under the 
          Securities Act of 1933 at prices ranging from $0.08 to $1.17 per 
          share upon exercise of stock options. Such issuances were made in 
          reliance upon the exemption from registration set forth in Rule 701 
          promulgated under the Securities Act of 1933.

Item 3.   Defaults Upon Senior Securities

          Not applicable

Item 4.   Submission of Matters to a Vote of Security Holders

          Not applicable

Item 5.   Other Information

          Not applicable

Item 6    Exhibits and Reports on Form 8-K

          (a)  Exhibits

<TABLE>
          <S>      <C>
          10.15    Bank line of credit agreement between the Registrant 
                   and U.S. National Bank of Oregon dated April 30, 1998
          27.1     Financial Data Schedule
          27.2     Restated Financial Data Schedules
</TABLE>
     
          (b)  Reports on Form 8-K
     
          Not applicable


                                       -25-
<PAGE>

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the 
Registrant has duly caused this report to be signed on its behalf by the 
undersigned thereunto duly authorized.

                                       SUMMIT DESIGN, INC.


                                       By:  /s/  C. Albert Koob
                                           -----------------------
                                           C. Albert Koob
                                           Vice President - Finance, 
                                           Chief Financial Officer and Secretary
                                           (Principal Financial and Accounting
                                           Officer and Duly Authorized Officer)

Date:     May 13, 1998

                                       -26-
<PAGE>

EXHIBIT INDEX

<TABLE>
<S>      <C>    <C>
EXHIBIT  10.15  Bank line of credit agreement between the Registrant  
                and U.S. National Bank of Oregon dated April 30, 1998 

EXHIBIT  27.1   Financial Data Schedule

EXHIBIT  27.2   Restated Financial Data Schedules
</TABLE>


                                       -27-

<PAGE>

                                                                         [LOGO]

ROSS A. BEATON
VICE PRESIDENT
OREGON CORPORATE BANKING

111 S.W. Fifth Avenue, Suite 400
Portland, OR 97204
503-275-6350
503-273-5795 Fax

April 30, 1998

Art Fletcher
Treasurer and Director of Financial Planning
Summit Design, Inc.
9305 S.W. Gemini Drive
Beaverton, OR 97005-7158

Gentlemen:

I am pleased to advise you that United States National Bank of Oregon ("Bank")
has approved the request of Summit Design, Inc. ("Summit"), for the following
credit facilities, subject to the following terms and conditions:

                          OPERATING LINE OF CREDIT

BORROWER:          Summit Design, Inc.

PURPOSE:           General Corporate Purposes.

BORROWING LIMIT:   $1,000,000.00

GUARANTORS:        None

EXPIRY:            April 30, 1999.

RATE:              Pricing will be based on United States National Bank 
                   of Oregon's Prime(l), or London Interbank Offering Rate 
                   ("LIBOR"), at the Borrower's option.  Rate will be fully 
                   floating and computed on a 360-day year.  The spread over 
                   the base rates will be determined quarterly by the 
                   Borrower's Total Liabilities/Tangible Net Worth "D/TNW"), 
                   as expressed in the chart below.



- ------------------------
1    The interest rate charged to Borrower is tied to the Prime Rate of United
     States National Bank of Oregon, Borrower is advised that United States 
     National Bank's Prime Rate is the rate of interest which the Bank from 
     time to time identifies and publicly announces as its Prime Rate, and is 
     not necessarily, for example the lowest rate of interest which the Bank 
     collects from any borrower or group of borrowers.

<PAGE>

Summit Design, Inc.
4/30/1998
Page 2


                 DEBT TO TANGIBLE NET WORTH IS DEFINED AS (TOTAL 
                 LIABILITIES MINUS UNEARNED REVENUE)/(SHAREHOLDERS'
                 EQUITY MINUS INTANGIBLES).

<TABLE>
<CAPTION>
           -----------------------------------------------------------
               DEBT/WORTH         PRIME PRICING   LIBOR PRICING
           -----------------------------------------------------------
           <S>                    <C>             <C>
              Greater than 0.50   Prime + 0%      LIBOR + 225 bps
                .26 to .050       Prime + 0%*     LIBOR + 200 bps
               Less than 0.26     Prime + 0%      LIBOR + 150 bps.
           -----------------------------------------------------------
</TABLE>
                               * At 12/31/97 the D/TNW was 0.66:1.00.
                                  (Overall LIBOR spreads have been reduced by 
                                  75 basis points, and Prime spreads have been 
                                  eliminated from the existing facility.)

                 LIBOR Terms:

                 A) Minimum Amount of $500,000, increments of $100,000
                    thereafter.

                 B) Maturity and availability: Up to three months; may not 
                    exceed Expiry.

                 C) Prepayment of LIBOR Borrowings not permitted.

                 D) Notification: Two day notification prior to 12:00 noon on 
                    the day of notification.

                 E) Irrevocability: Acceptance of a pricing commitment from 
                    the Bank will constitute an irrevocable agreement to borrow 
                    under the revolving line of credit.

                 F) Interest computed on the basis of a 360 day year and the
                    number of days elapsed.

REPAYMENT TERMS: Interest shall be payable monthly on the 1st day of each 
                 month.  Principal shall be payable on the earlier of April 
                 30, 1999, or demand by the Bank.  Repayment of each advance 
                 received by Borrower under the line of credit is subject to 
                 the terms of the promissory note evidencing that advance, as 
                 well as all terms and conditions of this letter.  In the 
                 event of any conflict between the two, the terms and 
                 conditions of the promissory note shall control.

FEES:            UP-FRONT FEE:    Initial up-front fee of 1/8 of 1% of the 
                 amount of the line of credit, due upon acceptance ($1,250).

                 COMMITMENT FEE:  A 1/8 of 1% fee, annualized, on the unused 
                 portion of the line of credit, payable quarterly in arrears.

<PAGE>


Summit Design, Inc.
4/30/1998
Page 3


COLLATERAL:      The revolving line of credit provides for a flexible 
                 collateral position according to the following matrix.  The 
                 assets of the Borrower which are referenced below include a 
                 first lien position in all accounts, contract rights, 
                 chattel paper, general intangibles and inventory.


QUICK RATIO*     COLLATERAL

 GREATER THAN 
  1.75:1.00      Unsecured with negative pledge agreement.

 LESS THAN OR =
  1.75:1.00      UNSECURED WITH NEGATIVE PLEDGE, IF NOT BORROWING.  If borrowing
                 and the ratio falls in this category, the line of credit will 
                 be secured.

 LESS THAN OR =  
  1.25:1.00      UNSECURED WITH NEGATIVE PLEDGE, IF NOT BORROWING.  If
                 borrowing, line is secured and advances are margined at 75% 
                 of eligible A/R up to 120 days after date of invoice.

                 * QUICK RATIO IS DEFINED AS ((CASH + NET TRADE ACCOUNTS)/
                   (CURRENT LIABILITIES - CURRENT PORTION OF UNEARNED REVENUE)).

DOCUMENTATION:   Execution of Notes, Loan Agreements, Security Agreements, 
                 UCC Financing Statements and all other documentation 
                 required by the Bank in a form satisfactory to the Bank.

BORROWER WILL COMPLY WITH THE FOLLOWING QUARTERLY FINANCIAL COVENANTS:

                 1. TANGIBLE NET WORTH shall not be less then $10,000,000.  
                    TANGIBLE NET WORTH IS DEFINED AS (SHAREHOLDER'S EQUITY -
                    INTANGIBLES).  NOTE: INTANGIBLES INCLUDE ALL CAPITALIZED
                    SOFTWARE.

                 2. TOTAL LIABILITIES TO TANGIBLE NET WORTH shall not exceed 
                    .75 to 1.00. TOTAL LIABILITIES TO TANGIBLE NET WORTH IS 
                    DEFINED AS (TOTAL LIABILITIES MINUS DEFERRED 
                    REVENUE)/(TANGIBLE NET WORTH).

                 Failure to maintain these covenants will be considered an 
                 event of default under the loan documents.

<PAGE>

Summit Design, Inc.
4/30/1998
Page 4


REPORTING REQUIREMENTS:

                 -  Quarterly financial statements to be submitted within 45 
                    days of quarter end.

                 -  Annual CPA audited financial statements to be submitted 
                    within 90 days of fiscal year end.

                 -  If the Quick Ratio falls to 1.25:1.00 or below: A 
                    Borrower's Certificate will be submitted with each advance,
                    and a Borrower's Certificate will accompany the monthly AR 
                    and AP agings.

ADVANCE 
 STRUCTURE:      Advances will be limited to the Borrowing Limit when the
                 Quick Ratio is greater than 1.25:1.00. When the quick ratio 
                 is less than or equal to 1.25:1.00, advances will be 
                 limited to 75% of eligible accounts receivable to 120 days 
                 after the date of invoice.

                 Disbursements under the line of credit shall terminate on the 
                 earlier occurrence of the date indicated above as the Expiry 
                 Date or the date on which this Bank, in its sole discretion, 
                 determines that there has been a material adverse change in 
                 the financial condition or management of the Borrower, or 
                 determines that there has been any non-compliance with any 
                 term or condition stated herein.  Non-compliance with the 
                 conditions and terms of this letter and all other loan 
                 documents will be considered as an event of default, 
                 entitling the Bank to all the default provisions as provided 
                 for in documents evidencing this line of credit.




If the above terms and conditions to extend this credit facility to Summit
Design, Inc. are acceptable to you, please sign and return the Acknowledgment
Copy of this letter on or before May 15, 1998.

<PAGE>

Summit Design, Inc.
4/30/1998
Page 5


We are pleased to provide you this borrowing accommodation and look forward to
serving your banking needs in the future.

Sincerely,

/s/ Ross A. Beaton

Ross A. Beaton
Vice President


BY OREGON STATUTE (ORS 41.580), THE FOLLOWING DISCLOSURE IS REQUIRED: UNDER
OREGON LAW MOST AGREEMENTS PROMISES AND COMMITMENTS MADE BY LENDERS AFTER
OCTOBER 3, 1989 CONCERNING LOANS AND OTHER CREDIT EXTENSIONS WHICH ARE NOT FOR
PERSONAL, FAMILY, OR HOUSEHOLD PURPOSE OR SECURED SOLELY BY THE BORROWER'S
RESIDENCE MUST BE IN WRITING, EXPRESS CONSIDERATION AND BE SIGNED BY THE LENDER
TO BE ENFORCEABLE.


THE UNDERSIGNED HEREBY ACKNOWLEDGES AND ACCEPTS THIS OFFER TO EXTEND CREDIT
SUBJECT TO THE TERMS AND CONDITIONS STATED ABOVE.

SUMMIT DESIGN, INC.

BY: /s/ C. Albert Koob      CFO                       4/30/98
    -----------------------------               -------------------------
                           Title                Date


<PAGE>

                            ALTERNATIVE RATE OPTIONS
                                PROMISSORY NOTE
                              (PRIME RATE, LIBOR)

$1,000,000.00                                                Dated as of: 5/1/98

 Summit Design, Inc.                                                ("Borrower")

U.S. BANK NATIONAL ASSOCIATION                                        ("Lender")

1.   TYPE OF CREDIT.  This note is given to evidence Borrower's obligation to 
repay all sums which Lender may from time to time advance to Borrower 
(Advances") under a:

 / / single disbursement loan.  Amounts loaned to Borrower hereunder will be 
     disbursed in a single Advance in the amount shown in Section 2.

 /X/ revolving line of credit.  No Advances shall be made which create a 
     maximum amount outstanding at any one time which exceeds the maximum 
     amount shown in Section 2. However, Advances hereunder may be borrowed, 
     repaid and reborrowed, and the aggregate Advances loaned hereunder from 
     time to time may exceed such maximum amount.

 / / non-revolving line of credit.  Each Advance made from time to time 
     hereunder shall reduce the maximum amount available shown in Section 2. 
     Advances loaned hereunder which are repaid may not be reborrowed.

2.   PRINCIPAL BALANCE.  The unpaid principal balance of all Advances 
outstanding under this note ('Principal Balance") at one time shall not 
exceed $1,000,000.00 .

3.   PROMISE TO PAY.  For value received Borrower promises to pay to Lender 
or order at COMMERCIAL LOAN SERVICING the Principal Balance of this note, with 
interest thereon at the rate(s) specified in Sections 4 and 11 below.

4.   INTEREST RATE.  The interest rate on the Principal Balance outstanding 
may vary from time to time pursuant to the provisions of this note.  Subject 
to the provisions of this note, Borrower shall have the option from time to 
time of choosing to pay interest at the rate or rates and for the applicable 
periods of time based on the rate options provided herein; PROVIDED, however, 
that once Borrower notifies Lender of the rate option chosen in accordance 
with the provisions of this note, such notice shall be irrevocable.  The rate 
options are the Prime Borrowing Rate and the LIBOR Borrowing Rate, each as 
defined herein.

(a)  Definitions.  The following terms shall have the following meanings:

            "Business Day" means any day other than a Saturday, Sunday, or 
other day that commercial banks in Portland, Oregon or New York City are 
authorized or required by law to close; provided, however that when used in 
connection with a LIBOR Rate, LIBOR Amount or LIBOR Interest Period such term 
shall also exclude any day on which dealings in U.S. dollar deposits are not 
carried on in the London interbank market.

            "LIBOR Amount" means each principal amount for which Borrower 
chooses to have the LIBOR Borrowing Rate apply for any specified LIBOR 
Interest Period.

            "LIBOR Interest Period" means as to any LIBOR Amount, a period of 
ONE, TWO OR THREE months commencing on the date the LIBOR Borrowing Rate 
becomes applicable thereto; PROVIDED, however, that: (i) the first day of 
each LIBOR Interest Period must be a Business Day; (ii) no LIBOR Interest 
Period shall be selected which would extend beyond EXPIRY; (iii) no LIBOR 
Interest Period shall extend beyond the date of any principal payment 
required under Section 6 of this note, unless the sum of the Prime Rate 
Amount, plus LIBOR Amounts with LIBOR Interest Periods ending on or before 
the scheduled date of such principal payment, plus principal amounts 
remaining unborrowed under a line of credit, equals or exceeds the amount of 
such principal payment; (iv) any LIBOR Interest Period which would otherwise 
expire on a day which is not a Business Day, shall be extended to the next 
succeeding Business Day, unless the result of such extension would be to 
extend such LIBOR Interest Period into another calendar month, in which event 
the LIBOR Interest Period shall end on the immediately preceding Business 
Day; and (v) any LIBOR Interest Period that begins on the last Business Day of 
a calendar month (or on a day for which there is no numerically corresponding 
day in the calendar month at the end of such LIBOR Interest Period) shall end 
on the last Business Day of a calendar month.

            "LIBOR Rate" means, for any LIBOR Interest Period, the rate per 
annum (computed on the basis of a 360-day year and the actual number of days 
elapsed and rounded upward to the nearest 1/16 of 1 %) established by Lender 
as its LIBOR Rate, based on Lenders determination, on the basis of such 
factors as Lender deems relevant, of the rate of interest at which U.S. 
dollar deposits would be offered to U.S. Bank National Association in the 
London interbank market at approximately 11 a.m. London time on the date 
which is two Business Days prior to the first day of such LIBOR Interest 
Period for delivery on the first day of such LIBOR Interest Period for the 
number of months therein; provided, however, that the LIBOR Rate shall be 
adjusted to take into account the maximum reserves required to be maintained 
for Eurocurrency liabilities by banks during each such LIBOR Interest Period 
as specified in Regulation D of the Board of Governors of the Federal Reserve 
System or any successor regulation.

            "Prime Rate" means the rate of interest which Lender from time to 
time establishes as its prime rate and is not, for example, the lowest rate 
of interest which Lender collects from any borrower or class of borrowers.  
When the Prime Rate is applicable under Section 4(b) or 11(b), the interest 
rate hereunder shall be adjusted without notice effective on the day the 
Prime Rate changes, but in no event shall the rate of interest be higher than 
allowed by law.

            "Prime Rate Amount" means any portion of the Principal Balance 
bearing interest at the Prime Borrowing Rate.

(b)  THE PRIME BORROWING RATE.

     (i)    The Prime Borrowing Rate is a per annum rate equal to the Prime 
Rate plus SEE ATTACHED EXHIBIT "A"% per annum.

     (ii)   Whenever Borrower desires to use the Prime Borrowing Rate option, 
Borrower shall give Lender notice orally or in writing in accordance with 
Section 15 of this note, which notice shall specify the requested effective 
date (which must be a Business Day) and principal amount of the Advance or 
increase in the Prime Rate Amount, and whether Borrower is requesting a new 
Advance under a line of credit or conversion of a LIBOR Amount to the Prime 
Borrowing Rate.

     (iii)  Subject to Section 11 of this note, interest shall accrue on the 
unpaid Principal Balance at the Prime Borrowing Rate unless and except to the 
extent that the LIBOR Borrowing Rate is in effect.

(c)  THE LIBOR BORROWING RATE.

     (i)    The LIBOR Borrowing Rate is the LIBOR Rate plus SEE ATTACHED 
EXHIBIT "A"% per annum.

     (ii)   Borrower may obtain LIBOR Borrowing Rate quotes from Lender 
between 8:00 a.m. and 10:00 a.m. (Portland, Oregon time) on any Business Day. 
Borrower may request an Advance, conversion of any portion of the Prime Rate 
Amount to a LIBOR Amount or a new LIBOR Interest Period for an existing LIBOR 
Amount, at such rate only by giving Lender notice in accordance with Section 
4 (c)(iii) before 10:00 a.m. (Portland, Oregon time) on such day.


                                                                     Page 1 of 4

<PAGE>

     (iii)  Whenever Borrower desires to use the LIBOR Borrowing Rate option, 
Borrower shall give Lender irrevocable notice (either in writing or orally 
and promptly confirmed in writing) between 8:00 a.m. and 10:00 a.m. 
(Portland, Oregon time) two (2) Business Days prior to the desired effective 
date of such rate. Any oral notice shall be given by, and any written notice 
or confirmation of an oral notice shall be signed by, the person(s) authorized 
in Section 15 of this note, and shall specify the requested effective date of 
the rate, LIBOR Interest Period and LIBOR Amount, and whether Borrower is 
requesting a new Advance at the LIBOR Borrowing Rate under a line of credit, 
conversion of all or any portion of the Prime Rate Amount to a LIBOR Amount, 
or a new LIBOR Interest Period for an outstanding LIBOR Amount. 
Notwithstanding any other term of this note, Borrower may elect the LIBOR 
Borrowing Rate in the minimum principal amount of $500,000.00 and in 
multiples of $100,000.00 above such amount; PROVIDED, however, that no more 
than N/A separate LIBOR Interest Periods may be in effect at any one time.

     (iv)   If at any time the LIBOR Rate is unascertainable or unavailable 
to Lender or if LIBOR Rate loans become unlawful, the option to select the 
LIBOR Borrowing Rate shall terminate immediately. If the LIBOR Borrowing Rate 
is then in effect, (A) it shall terminate automatically with respect to all 
LIBOR Amounts (i) on the last day of each then applicable LIBOR Interest 
Period, if Lender may lawfully continue to maintain such loans, or (ii) 
immediately if Lender may not lawfully continue to maintain such loans 
through such day, and (B) subject to Section 11, the Prime Borrowing Rate 
automatically shall become effective as to such amounts upon such termination.

     (v)    If at any time after the date hereof (A) any revision in or 
adoption of any applicable law, rule, or regulation or in the interpretation 
or administration thereof (i) shall subject Lender or its Eurodollar lending 
office to any tax, duty, or other charge, or change the basis of taxation of 
payments to Lender with respect to any loans bearing interest based on the 
LIBOR Rate, or (ii) shall impose or modify any reserve, insurance, special 
deposit, or similar requirements against assets of, deposits with or for the 
account of, or credit extended by Lender or its Eurodollar lending office, or 
impose on Lender or its Eurodollar lending office any other condition 
affecting any such loans, and (B) the result of any of the foregoing is (i) 
to increase the cost to Lender of making or maintaining any such loans or 
(ii) to reduce the amount of any sum receivable under this note by Lender or 
its Eurodollar lending office, Borrower shall pay Lender within 15 days after 
such demand by Lender such additional amount as will compensate Lender for 
such increased cost or reduction. The determination hereunder by Lender of 
such additional amount shall be conclusive in the absence of manifest error. 
If Lender demands compensation under this Section 4(c)(v), Borrower may upon 
three (3) Business Days' notice to Lender pay the accrued interest on all 
LIBOR Amounts, together with any additional amounts payable under Section 
4(c)(vi). Subject to Section 11, upon Borrower's paying such accrued interest 
and additional costs, the Prime Borrowing Rate immediately shall be effective 
with respect to the unpaid principal balance of such LIBOR Amounts.

     (vi)   Borrower shall pay to Lender, on demand, such amount as Lender 
reasonably determines (determined as though 100% of the applicable LIBOR 
Amount had been funded in the London interbank market) is necessary to 
compensate Lender for any direct or indirect losses, expenses, liabilities, 
costs, expenses or reductions in yield to Lender, whether incurred in 
connection with liquidation or re-employment of funds or otherwise, incurred 
or sustained by Lender as a result of: (A) Any payment or prepayment of a 
LIBOR Amount, termination of the LIBOR Borrowing Rate or conversion of a 
LIBOR Amount to the Prime Borrowing Rate on a day other than the last day of 
the applicable LIBOR Interest Period (including as a result of acceleration 
or a notice pursuant to Section 4(c)(v)); or (B) Any failure of Borrower to 
borrow, continue or prepay any LIBOR Amount or to convert any portion of the 
Prime Rate Amount to a LIBOR Amount after Borrower has given a notice thereof 
to Lender.

     (vii)  If Borrower chooses the LIBOR Borrowing Rate, Borrower shall pay 
interest based on such rate, plus any other applicable taxes or charges 
hereunder, even though Lender may have obtained the funds loaned to Borrower 
from sources other than the London Interbank market. Lender's determination of 
the LIBOR Borrowing Rate and any such taxes or charges shall be conclusive 
in the absence of manifest error.

     (viii) Notwithstanding any other term of this note, Borrower may not 
select the LIBOR Borrowing Rate if an event of default hereunder has occurred 
and is continuing.

     (ix)   Nothing contained in this note, including without limitation the 
determination of any LIBOR Interest Period or Lender's quotation of any LIBOR 
Borrowing Rate, shall be construed to prejudice Lender's right, if any, to 
decline to make any requested Advance or to require payment on demand.

5.   COMPUTATION OF INTEREST. All interest under Section 4 and Section 11 
will be computed at the applicable rate based on a 360-day year and applied 
to the actual number of days elapsed.

6.   PAYMENT SCHEDULE.

(a)  PRINCIPAL. Principal shall be paid:

     /x/    on demand.
     / /    on demand, or if no demand, on ______.
     / /    on ______.
     / /    subject to Section 8, in installments of
            / /    _____ each, plus accrued interest, beginning on ______ 
                   and on the same day of each ______ thereafter until 
                   _______ when the entire Principal Balance plus interest 
                   thereon shall be due and payable.
            / /    _____ each, including accrued interest, beginning on ______ 
                   and on the same day of each ______ thereafter until 
                   _______ when the entire Principal Balance plus interest 
                   thereon shall be due and payable.
     / /    ______.

(b)  INTEREST.

     (i)    Interest on the Prime Rate Amount shall be paid:

            /x/    on the 1ST day of JUNE and on the same day of each MONTH. 
                   thereafter prior to maturity and at maturity.
            / /    at maturity.
            / /    at the time each principal installment is due and at 
                   maturity.
            / /    ______.

     (ii)   Interest on all LIBOR Amounts shall be paid:

            /x/    on the last day of the applicable LIBOR Interest Period, 
                   and if such LIBOR Interest Period is longer than three 
                   months, on the last day of each three month period occurring 
                   during such LIBOR Interest Period, and at maturity.
            / /    on the _____ day of _____ and on the same day of each 
                   _____ thereafter prior to maturity and at maturity.
            / /    at maturity.
            / /    at the time each principal installment is due and at 
                   maturity.
            / /    ______.

7.   PREPAYMENT.

(a)  Prepayments of all or any part of the Prime Rate Amount may be made at 
     any time without penalty.
(b)  Except as otherwise specifically set forth herein, Borrower may not 
     prepay all or any part of any LIBOR Amount or terminate any LIBOR 
     Borrowing Rate, except on the last day of the applicable LIBOR Interest 
     Period.


                                                                     Page 2 of 4

<PAGE>

(c)  Principal prepayments will not postpone the date of or change the 
     amount of any regularly scheduled payment. At the time of any principal 
     prepayment, all accrued interest, fees, costs and expenses shall also 
     be paid.

8.   CHANGE IN PAYMENT AMOUNT. Each time the interest rate on this note 
changes the holder of this note may, from time to time, in holder's sole 
discretion, increase or decrease the amount of each of the installments 
remaining unpaid at the time of such change in rate to an amount holder in 
its sole discretion deems necessary to continue amortizing the Principal 
Balance at the same rate established by the installment amounts specified in 
Section 6(a), whether or not a "balloon" payment may also be due upon 
maturity of this note. Holder shall notify the undersigned of each such 
change in writing.  Whether or not the installment amount is increased under 
this Section 8, Borrower understands that, as a result of increases in the 
rate of interest the final payment due, whether or not a "balloon" payment, 
shall include the entire Principal Balance and interest thereon then 
outstanding, and may be substantially more than the installment specified in 
Section 6.

9.   ALTERNATE PAYMENT DATE. Notwithstanding any other term of this note, if 
any month there is no day on which a scheduled payment would otherwise be due 
(e.g. February 31), such payment shall be paid on the last banking day of 
that month.

10.  PAYMENT BY AUTOMATIC DEBIT.

/ /  Borrower hereby authorizes Lender to automatically deduct the amount of 
all principal and interest payments from account number 139-0008-934 at 
WASHINGTON SQUARE. If there are insufficient funds in the account to pay the 
automatic deduction in full, Lender may allow the account to become 
overdrawn, or Lender may reverse the automatic deduction. Borrower will pay 
all the fees in the account which result from the automatic deductions, 
including any overdraft and non-sufficient funds charges. If for any reason 
Lender does not charge the account for a payment, or if an automatic payment 
is reversed, the payment is still due according to this note. If the account 
is a Money Market Account, the number of withdrawals from that account is 
limited as set out in the account agreement. Lender may cancel the automatic 
deduction at any time in its discretion.

Provided, however, if no account number is entered above, Borrower does not 
want to make payments by automatic debit.

11.  DEFAULT.

(a)  Without prejudice to any right of Lender to require payment on demand or 
to decline to make any requested Advance, each of the following shall be an 
event of default: (i) Borrower fails to make any payment when due, (ii) 
Borrower fails to perform or comply with any term, covenant or obligation in 
this note or any agreement related to this note, or in any other agreement or 
loan Borrower has with Lender, (iii) Borrower defaults under any loan, 
extension of credit, security agreement, purchase or sales agreement, or any 
other agreement, in favor of any other creditor or person that may materially 
affect any of Borrower's property or Borrower's ability to repay this note or 
perform Borrower's obligations under this note or any related documents, (iv) 
Any representation or statement made or furnished to Lender by Borrower or on 
Borrower's behalf is false or misleading in any material respect either now 
or at the time made or furnished, (v) Borrower dies, becomes insolvent, 
liquidates or dissolves, a receiver is appointed for any part of Borrower's 
property, Borrower makes an assignment for the benefit of creditors, or any 
proceeding is commenced either by Borrower or against Borrower under any 
bankruptcy or insolvency laws, (vi) Any creditor tries to take any of 
Borrower's property on or in which Lender has a lien or security interest. 
This includes a garnishment of any of Borrower's accounts with Lender, (vii) 
Any of the events described in this default section occurs with respect to 
any general partner in Borrower or any guarantor of this note, or any 
guaranty of Borrower's indebtedness to Lender ceases to be, or is asserted 
not to be, in full force and effect, (viii) There is any material adverse 
change in the financial condition or management of Borrower or Lender in good 
faith deems itself insecure with respect to the payment or performance of 
Borrower's obligations to Lender. If this note is payable on demand, the 
inclusion of specific events of default shall not prejudice Lender's right 
to require payment on demand or to decline to make any requested Advance.

(b)  Without prejudice to any right of Lender to require payment on demand, 
upon the occurrence of an event of default, Lender may declare the entire 
unpaid Principal Balance on this note and all accrued unpaid interest 
immediately due and payable, without notice. Upon default, including failure 
to pay upon final maturity, Lender, at its option, may also, if permitted 
under applicable law, increase the interest rate on this note to a rate equal 
to the Prime Borrowing Rate plus 5%. The interest rate will not exceed the 
maximum rate permitted by applicable law. In addition, if any payment of 
principal or interest is 19 or more days past due, Borrower will be charged a 
late charge of 5% of the delinquent payment.

12.  EVIDENCE OF PRINCIPAL BALANCE; PAYMENT ON DEMAND. Holder's records 
shall, at any time, be conclusive evidence of the unpaid Principal Balance 
and interest owing on this note. Notwithstanding any other provisions of 
this note, in the event holder makes Advances hereunder which result in an 
unpaid Principal Balance on this note which at any time exceeds the maximum 
amount specified in Section 2, Borrower agrees that all such Advances, with 
interest, shall be payable on demand.

13.  LINE OF CREDIT PROVISIONS. If the type of credit indicated in Section 1 
is a revolving line of credit or a non-revolving line of credit, Borrower 
agrees that Lender is under no obligation and has not committed to make any 
Advances hereunder. Each Advance hereunder shall be made at the sole option 
of the Lender.

14.  DEMAND NOTE. If this note is payable on demand, Borrower acknowledges 
and agrees that (a) Lender is entitled to demand Borrower's immediate payment 
in full of all amount owing hereunder and (b) neither anything to the 
contrary contained herein or in any other loan documents (including but not 
limited to, provisions relating to defaults, rights of cure, default rate of 
interest, installment payments, late charges, periodic review of Borrower's 
financial condition, and covenants) nor any act of Lender pursuant to any 
such provisions shall limit or impair Lender's right or ability to require 
Borrower's payment in full of all amounts owing hereunder immediately upon 
Lender's demand.

15.  REQUESTS FOR ADVANCES.

(a)  Any Advance may be made or interest rate option selected upon the 
request of Borrower (if an individual), any of the undersigned (if Borrower 
consists of more than one individual), any person or persons authorized in 
subsection (b) of this Section 15, and any person or persons otherwise 
authorized to execute and deliver promissory notes to Lender on behalf of 
Borrower.

(b)  Borrower hereby authorizes any ________ of the following individuals to 
request Advances and to select interest rate options: ________ unless Lender 
is otherwise instructed in writing.

(c)  All Advances shall be disbursed by deposit directly to Borrower's 
account number ________ at ________ branch of Lender, or by cashier's check 
issued to Borrower.

(d)  Borrower agrees that Lender shall have no obligation to verify the 
identity of any person making any request pursuant to this Section 15, and 
Borrower assumes all risks of the validity and authorization of such 
requests.  In consideration of Lender agreeing, at its sole discretion, to 
make Advances upon such requests, Borrower promises to pay holder, in 
accordance with the provisions of this note, the Principal Balance together 
with interest thereon and other sums due hereunder, although any Advances may 
have been requested by a person or persons not authorized to do so.

16.  PERIODIC VIEW.  Lender will review Borrower's credit accommodations 
periodically.  At the time of the review, Borrower will furnish Lender with 
any additional information regarding Borrower's financial condition and 
business operations that Lender requests.  This information may include but is 
not limited to, financial statements, tax returns, lists of assets and 
liabilities, agings of receivables and payables, inventory schedules, budgets 
and forecasts.  If upon review, Lender, in its sole discretion, determines 
that there has been a material adverse change in Borrower's financial 
condition, Borrower will be in default.  Upon default, Lender shall have all 
rights specified herein.

17.  NOTICES.  Any notice hereunder may be given by ordinary mail, postage 
paid and addressed to Borrower at the last known address of Borrower as shown 
on holder's records.  If Borrower consists of more than one person, 
notification of any of said persons shall be complete notification of all.

18.  ATTORNEY FEES.  Whether or not litigation or arbitration is commenced, 
Borrower promises to pay all costs of collecting overdue amounts.  Without 
limiting the foregoing, in the event that holder consults an attorney 
regarding the enforcement of any of its rights under this note or any 
document securing the same, or if this note is placed in the hands of an 
attorney for collection or if suit or litigation is brought to enforce this 
note or any document 


                                                                     Page 3 of 4

<PAGE>

securing the same, Borrower promises to pay all costs thereof including such 
additional sums as the court or arbitrator(s) may adjudge reasonable as 
attorney fees, including without limitation, costs and attorney fees 
incurred in any appellate court, in any proceeding under the bankruptcy code, 
or in any receivership and post-judgment attorney fees incurred in enforcing 
any judgment.

19.  WAIVERS; CONSENT. Each party hereto, whether maker, co-maker, guarantor 
or otherwise, waives diligence, demand, presentment for payment, notice of 
non-payment, protest and notice of protest and waives all defenses based on 
suretyship or impairment of collateral. Without notice to Borrower and 
without diminishing or affecting Lender's rights or Borrower's obligations 
hereunder, Lender may deal in any manner with any person who at any time is 
liable for, or provides any real or personal property collateral for, any 
indebtedness of Borrower to Lender, including the indebtedness evidenced by 
this note. Without limiting the foregoing, Lender may, in its sole 
discretion: (a) make secured or unsecured loans to Borrower and agree to any 
number of waivers, modifications, extensions and renewals of any length of 
such loans, including the loan evidenced by this note; (b) impair, release 
(with or without substitution of new collateral), fail to perfect a security 
interest in, fail to preserve the value of, fail to dispose of in accordance 
with applicable law, any collateral provided by any person; (c) sue, fail to 
sue, agree not to sue, release, and settle or compromise with, any person.

20.  JOINT AND SEVERAL LIABILITY. All undertakings of the undersigned 
Borrowers are joint and several and are binding upon any marital community of 
which any of the undersigned are members. Holder's rights and remedies under 
this note shall be cumulative.

21.  SEVERABILITY. If any term or provision of this note is declared by a 
court of competent jurisdiction to be illegal, invalid or unenforceable for 
any reason whatsoever, such illegality, invalidity or unenforceability shall 
not affect the balance of the terms and provisions hereof, which terms and 
provisions shall remain binding and enforceable, and this note shall be 
construed as if such illegal, invalid or unenforceable provision had not been 
contained herein.

22.  ARBITRATION. 

(a)  Either Lender or Borrower may require that all disputes, claims, 
counterclaims and defenses, including those based on or arising from any 
alleged tort ("Claims") relating in any way to this note or any transaction 
of which this note is a part (the "Loan"), be settled by binding arbitration 
in accordance with the Commercial Arbitration Rules of the American 
Arbitration Association and Title 9 of the U.S. Code. All Claims will be 
subject to the statutes of limitation applicable if they were litigated. 
This provision is void if the Loan, at the time of the proposed submission 
to arbitration, is secured by real property located outside of Oregon or 
Washington, or if the effect of the arbitration procedure (as opposed to any 
Claims of Borrower) would be to materially impair Lender's ability to realize 
on any collateral securing the Loan.

(b)  If arbitration occurs and each party's Claim is less than $100,000, one 
neutral arbitrator will decide all issues; if any party's Claim is $100,000 
or more, three neutral arbitrators will decide all issues. All arbitrators 
will be active Oregon State Bar members in good standing. All arbitration 
hearings will be held in Portland, Oregon. In addition to all other powers, 
the arbitrator(s) shall have the exclusive right to determine all issues of 
arbitrability. Judgment on any arbitration award may be entered in any court 
with jurisdiction.

(c)  If either party institutes any judicial proceeding relating to the Loan, 
such action shall not be a waiver of the right to submit any Claim to 
arbitration. In addition, each has the right before, during and after any 
arbitration to exercise any number of the following remedies, in any order or 
concurrently: (i) setoff; (ii) self-help repossession; (iii) judicial or 
non-judicial foreclosure against real or personal property collateral; and 
(iv) provisional remedies, including injunction, appointment of receiver, 
attachment, claim and delivery and replevin.

23.  GOVERNING LAW. This note shall be governed by and construed and enforced 
in accordance with the laws of the State of Oregon without regard to 
conflicts of law principles; PROVIDED, however, that to the extent that 
Lender has greater rights or remedies under Federal law, this provision shall 
not be deemed to deprive Lender of such rights and remedies as may be 
available under Federal law.

24.  DISCLOSURE. 

UNDER OREGON LAW, MOST AGREEMENTS, PROMISES AND COMMITMENTS MADE BY LENDERS 
AFTER OCTOBER 3, 1989 CONCERNING LOANS AND OTHER CREDIT EXTENSIONS WHICH ARE 
NOT FOR PERSONAL, FAMILY OR HOUSEHOLD PURPOSES OR SECURED SOLELY BY THE 
BORROWER'S RESIDENCE MUST BE IN WRITING, EXPRESS CONSIDERATION AND BE SIGNED 
BY THE LENDER TO BE ENFORCEABLE.

EACH OF THE UNDERSIGNED HEREBY ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF 
THIS DOCUMENT.


SUMMIT DESIGN, INC.
- ------------------------------------       ------------------------------------
Borrower Name (Corporation, Partnership    Signature of Individual Borrower
or other Entity)

/s/ C. Albert Koob          CFO
- ------------------------------------       ------------------------------------
By                         Title           Signature of Individual Borrower

- ------------------------------------       ------------------------------------
By                         Title           Signature of Individual Borrower

- -------------------------------------------------------------------------------


For valuable consideration, Lender agrees to the terms of the arbitration 
provision set forth in this note.

                                    Lender Name: U.S. BANK NATIONAL ASSOCIATION
                                                -------------------------------

                                    By: 
                                           ------------------------------------

                                    Title: 
                                           ------------------------------------

                                    Date: 
                                           ------------------------------------


                                                                     Page 4 of 4

<PAGE>

                              SUMMIT DESIGN, INC.
                                  "EXHIBIT A"
                     TO PROMISSORY NOTE DATED MAY 1, 1998


     Borrower's interest rate shall be tied to a Pricing Matrix based upon 
     Borrower's Debt to Tangible Net Worth Ratio.

     The Debt to Tangible Net Worth Ratio is defined as: Total Liabilities 
     minus unearned Revenue DIVIDED BY Shareholders' Equity minus Intangibles.

     The interest rate option shall be adjusted quarterly based upon the 
     following Pricing Matrix:


<TABLE>
<CAPTION>
        ----------------------------------------------------------------
          DEBT TO TANGIBLE NET WORTH   PRIME + SPREAD   LIBOR + SPREAD
                    RATIO
        ----------------------------------------------------------------
          <S>                          <C>              <C>
               GREATER THAN .50             0 bps          225 bps
                 0.26 TO 0.50               0 bps          200 bps
                LESS THAN 0.26              0 bps          150 bps
        ----------------------------------------------------------------
</TABLE>




Summit Design, Inc.

/s/ C. Albert Koob          CFO      4/30/98
- ---------------------------------------------
signature/title                       Date





<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          20,364
<SECURITIES>                                         0
<RECEIVABLES>                                    5,870
<ALLOWANCES>                                       592
<INVENTORY>                                          0
<CURRENT-ASSETS>                                27,282
<PP&E>                                           4,663
<DEPRECIATION>                                   1,803
<TOTAL-ASSETS>                                  33,222
<CURRENT-LIABILITIES>                           11,582
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           158
<OTHER-SE>                                      21,104
<TOTAL-LIABILITY-AND-EQUITY>                    33,222
<SALES>                                              0
<TOTAL-REVENUES>                                10,206
<CGS>                                                0
<TOTAL-COSTS>                                      489
<OTHER-EXPENSES>                                 6,460
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   1
<INCOME-PRETAX>                                  3,545
<INCOME-TAX>                                       945
<INCOME-CONTINUING>                              2,600
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,600
<EPS-PRIMARY>                                     0.18
<EPS-DILUTED>                                     0.16
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS RESTATED SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
RESPECTIVE CONSOLIDATED BALANCE SHEETS AS OF SEP-30-1997, JUN-30-1997 AND
MAR-31-1997 AND THE RELATED STATEMENTS OF INCOME AND CASH FLOWS FOR THE
RESPECTIVE PERIODS THEN ENDED AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                          19,859                  21,992                  17,224
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                    6,266                   6,364                   5,667
<ALLOWANCES>                                       378                     439                     449
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                26,245                  28,335                  22,961
<PP&E>                                           3,745                   4,244                   5,099
<DEPRECIATION>                                   1,837                   2,030                   2,522
<TOTAL-ASSETS>                                  29,140                  31,805                  29,306
<CURRENT-LIABILITIES>                            7,790                   8,439                  12,605
<BONDS>                                              0                       0                       0
                                0                       0                       0
                                          0                       0                       0
<COMMON>                                           139                     140                     146
<OTHER-SE>                                      20,269                  22,397                  15,488
<TOTAL-LIABILITY-AND-EQUITY>                    29,140                  31,805                  29,306
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                 6,501                  13,620                  21,486
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                      294                     599                     954
<OTHER-EXPENSES>                                 5,125                  10,230                  35,427
<LOSS-PROVISION>                                     0                      60                     120
<INTEREST-EXPENSE>                                   7                       9                      10
<INCOME-PRETAX>                                  1,293                   3,231                 (8,539)
<INCOME-TAX>                                        80                     180                     820
<INCOME-CONTINUING>                              1,213                   3,051                 (9,359)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     1,213                   3,051                 (9,359)
<EPS-PRIMARY>                                     0.09                    0.22                  (0.67)
<EPS-DILUTED>                                     0.08                    0.21                  (0.67)
        

</TABLE>


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