This new edition describes current best practices in requirements engineering with a focus primarily on software systems but also on systems that may contain other elements such as hardware or people. The text consists of original papers, written by experts in the fields, plus reprints of survey articles on many aspects of requirements engineering. The book begins with an introduction to current issues and the basic terminology of the software requirements engineering process. In addition, the text covers the five basic phases of software requirements engineering: elicitation, analysis, specification, verification, and management. The book:. Looks at the science and discipline of establishing and documenting software requirements. Describes the process through which developers' and users' discover, review, articulate, and understand the users' needs and the constraints on the software and development. Shows how to analyzes the users' needs to arrive at a definition of their software requirements. Examines software requirements and the need to clearly document and precisely record each requirement. Looks at verification to ensure that the software requirements specifications are in compliance with the system requirements and conform to document standards. Details software requirements management including planning and controlling of all these activities.