Types of cohesion

Cohesion is a qualitative measure, meaning that the source code is examined using a rubric to determine a classification. Cohesion types, from the worst to the best, are as follows:

;Coincidental cohesion (worst): Coincidental cohesion is when parts of a module are grouped arbitrarily. The only relationship between the parts is that they have been grouped together (e.g., a "Utilities" class). Example:
::/*Groups: The function definitionsParts: The terms on each function
*/Module A { /* Implementation of r(x) = 5x + 3 There is no particular reason to group functions in this way, so the module is said to have Coincidental Cohesion. */ r(x) = a(x) + b(x) a(x) = 2x + 1 b(x) = 3x + 2}

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