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Rational Software Corporation purchased Requisite, Inc., in 1997. At Rational, I gained significant additional experience in requirements management as it applies to developing and releasing a full family of application development tools, as well as continuing to help customers address their requirements problems. I also had the unique pleasure of working with some of the industry's foremost software experts and authors, including Grady Booch, Ivar Jacobson, James Rumbaugh, Walker Royce, and Philippe Kruchten. Each of them contributed to my view of the requirements management challenge, and Walker and Philippe were early reviewers of this work.
We also became exposed to the use case technique for requirements capture, and to the concept of using use cases within the design model to provide a common thread to drive architecture, implementation, and testing.
I am also a fan of Rational's promulgation of the iterative approach for software development, of which I like to think that we were early practitioners at RELA, as well as the Rational Unified Process, a full lifecycle software development process.
Rational helped me complete this work, and for that I am grateful. Also, Rational graciously provided permission to use certain ideas, text, and diagrams.