Class Category Relational Cohesion (CCRC)

Overview

The Class Category Relational Cohesion metric measures the rate of cohesion between a package's classes.

The grouping of classes in a package must be justified by the links that exist between its classes. The relevance of a package can be questioned, if its classes have relatively few links between themselves.

Computation

The ... variable	represents the…
NumberOfLinks	number of links (associations, generalizations, use links) between a package's classes with multiple counting if a class uses another class in several different ways.
NumberOfClasses	number of classes of the package, by recursively processing sub-packages and classes. For the UML modeling project, this variable represents, therefore, the total number of classes for the UML modeling project.

Nominal range

Between 150% and 350%.

Analysis

Architecture is that much more consistent if the number of internal links in each package is relatively large. However, these links must remain within certain limits (less than 350%) for reasons of complexity.