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

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20.8. Order of Implementation

Classes need to be implemented (and ideally, fully unit tested) from least-coupled to most-coupled (see Figure 20.11). For example, possible first classes to implement are either Payment or ProductSpecification; next are classes only dependent on the prior implementations—ProductCatalog or SalesLineItem.

Figure 20.11. Possible order of class implementation and testing.

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