Component Packaging Principles

Updated 22 Jul 2026

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def
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  principles for grouping classes into packages/components for release and reuse
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principles
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  release-reuse equivalency principle (REP)
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    the granularity of reuse is the granularity of release
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    group reusable classes into packages that can be managed, upgraded, and controlled as new versions are released
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  common closure principle (CCP)
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    classes that change together belong together
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    package classes cohesively — if one class in a package changes due to a requirement change, they all likely will
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  common reuse principle (CRP)
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    classes that are not reused together should not be grouped together
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    grouping unrelated classes leads to unnecessary integration and testing when only some classes change
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  related

Linked references 3