Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
by Craig Larman
Introduction
Use cases can be related to each other. For example, a subfunction use case such as Handle Credit Payment may be part of several regular use cases, such as Process Sale and Process Rental. Organizing use cases into relationships has no impact on the behavior or requirements of the system. Rather, it is simply an organization mechanism to (ideally) improve communication and comprehension of the use cases, reduce duplication of text, and improve management of the use case documents.
A Caution
In some organizations working with use cases, unproductive time has been spent debating how to relate use cases in a use case diagram, rather than the important use case work: writing text. Consequently, although this chapter discusses relating ...
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