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Software Requirements by Karl E Wiegers and Joy Beatty

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Chapter 21. Enhancement and replacement projects

Most of this book describes requirements development as though you are beginning a new software or system development project, sometimes called a green-field project. However, many organizations devote much of their effort to enhancing or replacing existing information systems or building new releases of established commercial products. Most of the practices described in this book are appropriate for enhancement and replacement projects. This chapter provides specific suggestions as to which practices are most relevant and how to use them.

An enhancement project is one in which new capabilities are added to an existing system. Enhancement projects might also involve correcting defects, adding new ...

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