Book excerpt: Examining the importance of aligning computer security (information assurance) with the goals of an organization, this book gives security personnel direction as to how systems should be designed, the process for doing so, and a methodology to follow. By studying this book, readers will acquire the skills necessary to develop a security architecture that serves specific needs. They will come to understand distinctions amongst engineering architecture, solutions architecture, and systems engineering. The book also shows how the Zachman and the Federal Enterprise Architecture models can be used together to achieve the goals of a business or government agency.