Kurt Bittner works for IBM on software development solutions strategy. In a career spanning 24 years, he has successfully applied an iterative approach to software development in a number of industries and problem domains. He was a member of the original team that developed the IBM Rational Unified Process and is a co-author with Ian Spence of Use Case Modeling, published by Addison-Wesley in 2002.
Ian Spence is a chief scientist and principle consultant at Ivar Jacobson Consulting, specializing in the adoption of the Unified Process and the iterative, use-case driven approach that it recommends. He has more than 20 years of experience in the software industry, including more than 10 years of experience in managing and participating in iterative projects. He is currently involved in the development of the next generation of lightweight software development processes and is a co-author with Kurt Bittner of Use Case Modeling, published by Addison-Wesley in 2002.