Manual testing 47 - What is defect leakage or bug leakage? What is Bug leakage formula?

Defect leakage or bug leakage
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#qa #testing #manualtesting #agile #defect #bug #softwaretesting #bugleakageformula #testingprocess #qaprocess #defectleakage #bugleakage #uat #productiondefect #uatdefect
Agenda
What is bug leakage or defect leakage?
How to calculate bug leakage(Bug leakage formula)
Reasons for bug leakage
How to prevent bug leakage
Possible interview questions
What is bug leakage or defect leakage?
Percentage of defects leaked from the current testing phase to the subsequent phase.
It is a metric to identify test team efficiency
It is measured in percentage
Defect leakage percentage has to be minimal
How to calculate bug leakage(Bug leakage formula)
Defect leakage (%) ={#defects found during next phase/(#defects found during testing phase + #defects found during next phase)}*100
Defect leakage (%) =( 25 UAT bugs/ 100 test phase bugs + 25 UAT bugs)*100 = 20%
Means that 20% of the defects were leaked by the Testing team to the next phase(UAT),
or in other words test team wasn’t able to identify these 20% of the defects.
Reasons for bug leakage
Environment differences
Missing test cases to cover appropriate condition
Poor test case review
Poorly designed test case due to misunderstood requirements
Incorrect deployment in UAT or Production
Incorrect test data used in previous environment
How to prevent bug leakage
Analyze the requirements in details
Attention to details
Perform the rigorous testing
Simulate the real time scenarios
Use valid data and invalid data while testing
Possible Interview Questions
What is bug leakage or defect leakage?
How to calculate bug leakage?
What is bug leakage formula?
What are the reasons for bug leakage?
How bug leakage can be prevented?
Videos referred in the video :
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