Rational Appoints Ivar Jacobson as Vice President of Business Engineering and to the Office of the President.

SANTA CLARA, Calif.--(BUSINESS WIRE)--Oct. 16, 1995--Rational Software Corporation announced today the appointment of Ivar Jacobson as vice president of business engineering and to the office of the president, which includes Paul Levy, president, and Mike Devlin, chairman.

Jacobson comes to Rational from Objectory AB, which recently merged with Rational. In his new position, Jacobson will help define the company's strategy and lead Rational's expansion into business and systems engineering through the integration of the Objectory and Rational products.

"Ivar Jacobson is one of the leading authorities on object technology and business engineering," said Paul D. Levy, president and chief executive officer of Rational. "Ivar will play a key role in the evolution of Rational's overall strategy. He will also remain heavily engaged with Rational's major customers and strategic partners worldwide." In addition, Jacobson will join Grady Booch, chief scientist at Rational, and Jim Rumbaugh, Rational fellow, in their ongoing work to create a standard unified notation for object-oriented development.

"Over the years, Jim, Grady, and I have exchanged ideas and worked together informally as we evolved our methods," Jacobson said. "I am looking forward to working with them to fully integrate Objectory modeling concepts, such as use cases and business modeling architectures, into the current draft of the unified notation."

Jacobson has more than 25 years of experience in using object methods for the design of large real-time systems. He is the founder of Objectory and inventor of the Object-Oriented Software Engineering (OOSE) method and use-case technology.

Use-case technology is used worldwide for capturing system requirements, which then serve as the starting point for the detailed software-engineering process: developing the software architecture, detailed design, implementation, testing, debugging, documentation, and maintenance. Use-case technology is widely recognized as a seminal contribution to object technology.

Before founding Objectory in 1987, Jacobson worked for L.M. Ericsson AB in Sweden, where he was the chief architect and founder of the object-based design technique that Ericsson then developed and used on its world-famous and world-leading AXE10 telecommunications switching- system concept.

Jacobson earned a Ph.D. in 1985 based on his dissertation about modeling concepts for large real-time systems, which became the theoretical foundation of his OOSE method as well as the Objectory process, method, and notation.

Jacobson regularly serves on the program committees for a variety of trade shows and conferences, such as OOPSLA, ECOOP, and TOOLS. He is a member of the advisory board of the Journal of Object-Oriented Programming. In addition, Jacobson is the principal author of two books, Object-Oriented Software Engineering -- A Use Case Driven Approach and The Object Advantage -- Business Process Reengineering with Object Technology.

Rational Software Corporation (NASDAQ:RATL) develops, markets, and supports a comprehensive solution for developing and managing complex software systems. The company provides a configurable process that can be tailored and implemented into an organization to support its specific software-engineering needs. This process is supported by an integrated family of tools that can be tailored to provide specific support for all the critical phases of the software- development process, from business engineering and systems engineering, through initial analysis and design, to implementation, delivery, and maintenance.

These products are designed for use with industry-standard hardware platforms and operating systems. In addition, Rational provides a full range of technical consulting, training, and support services as an integral component of its solution. -0-

For more information contact: Rational Software Corporation 2800 San Tomas Expressway Santa Clara, CA 95051-0951 Tel. [phone] or 800-RAT-1212 Fax [phone] E-mail [e-mail] URL http://www.rational.com

CONTACT: Rational Software Corporation, Santa Clara

Kara Myers, 408/496-3891

[e-mail]