Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition

Introduction

Not all requirements are created equal. This chapter introduces the FURPS+ requirements categories.

Requirements are capabilities and conditions to which the system—and more broadly, the project—must conform [JBR99]. A prime challenge of requirements work is to find, communicate, and remember (that usually means record) what is really needed, in a form that clearly speaks to the client and development team members.

The UP promotes a set of best practices, one of which is manage requirements. This does not refer to the waterfall attitude of attempting to fully define and stabilize the requirements in the first phase of a project, but rather—in the context of inevitably changing and unclear stakeholder's wishes—“a systematic approach ...