This book is a comprehensive guide to developing quality software requirements. It describes dozens of field-proven techniques for identifying, formulating, developing, reviewing, validating, and testing requirements to help developers, managers, and marketers create effective software. This edition has been updated with new techniques for developing requirements in agile development projects. The primary audience is business analysts and developers, as well as designers, programmers, testers and other team members whose task is to understand and satisfy customer expectations, as well as marketers, product managers and project managers who must understand the spirit and features of the product to make it fully competitive. The book consists of 32 chapters, 3 appendices and a glossary of terms.