Donald Firesmith (see http://en.wikipedia.org/wiki/Donald_Firesmith) is a principal engineer at the SEI, where he works in the software support division helping the US Government acquire large complex software-intensive systems. With over 35 years of industry experience, he has published 7 system/software engineering books, primarily in the areas of system/software architecture engineering, testing, process engineering, and object orientation. His eighth book The Safety and Security Requirements Engineering is currently being completed. He is the founding chair of the OPEN Process Framework (OPF) Repository organization www.opfro.org, which provides the world's largest free open-source w...