Synopsis This book provides a comprehensive material of software engineering techniques and their application in practical software projects. This book takes a broad perspective to software projects. This book takes a broad-perspective to software engineering, offering readers solid coverage of the software process and software process technology, system integration, requirements management, and risk analysis, as well as pattern-based reuse, distributed system engineering, and legacy systems. We have incorporated coverage of new software development paradigms, namely agile methods and component-based software engineering, along with dependability issues –availability, security and critical systems –making the book more in tune with current technology and practice. This book is designed to be used as a complete textbook of software engineering (Development, management, and evolution), especially with regard to system requirements engineering ad critical systems.