Below are few software testing metrics.
1) Test coverage metrics :
(No of requirements covered for test case development) / (Total no of requirements)
2) Test case design productivity :
(No of test cases developed) / (Engineering day)
Here 1 engineering day is 8 hours.
Standard value for test case design productivity is 25 to 30.
3) Test case execution productivity :
(No of test cases executed) / (Engineering day)
Standard value for test case execution productivity is 30 to 35.
Test effort estimation
1) Schedule variance = ((Estimated Schedule – Actual Schedule)/Estimated Schedule)) * 100
2) Effort variance = ((Estimated effort – Actual effort)/Estimated effort)) * 100
Defect metrics
1) Defect prevention ratio :
((Sum of all review defects) + (Number of unit test defects) ) / ((Numerator) + (Sum of defects in integration and system testing))
Acceptable value for defect prevention ratio is 0.85
2) Defect detection ratio :
((Sum of all review defects) + (Sum of integration testing and system testing defects)) / ((Numerator) + (Sum of user acceptance testing defects))
Acceptable value for defect detection ratio is 0.98.
Any suggestions for improvements is appreciated.
Best Regards
Narasimha Murthy.
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