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What is defect leakage? any one answer my question.

thanks

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Hi,

Defects which are found in production and missed during system test is called Defect Leakage.

I think there is a metric to measure the defect leakage. A matrix is built to deal with leakage.

Reasons for leakage are gathered, analyzed and action plans are set to overcome them in future.

Thanks,
Siddiq

Metric for Defect Leakage: 

Number of defects found in current phase that were supposed to be found in previous phase


                             Number of defects found in the previous phase

e.g.  If 40 defects were found during product testing and 5 defects were found in UAT and 2 in production environment then defect leakage % will be 17.5 % ((5+2)/40*100)
 
 
 
This is not my information..
 
Defect leakage occurs at the Customer or the End user side after the application delivery. After the release of the application to the client, if the end user gets any type of defects by using that application then it is called as Defect leakage. This Defect Leakage is also called as Bug Leak.
If any defect which we could not find out in system test then it is called as defect leakage.
There are some defects but during testing, we are unable to find out that but end user only getting that, then it is called defect leakage.

Defect Leakage: Total Number of Defects rejected/reopened by client after delivery.

The defect or issue or bug filed by the end user or customer that is missed by the QA is defined as defect leakage.

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