Coupling-to-Cohesion ratio inversely correlated to errors
Given a sample of 450 routines, the routines with the highest coupling-to-cohesion ratios had 7 times more errors than those with the lowest ratios.
IfSQ Defect Indicators based on this finding:
SP-4—Module Not Cohesive
Routines which are cohesive are typically easier to modify, easier to fix and contain less errors than routines wth diverse tasks.