The Bug Escape Rate is a critical quality metric in software testing that measures the effectiveness of the software testing process before a product release.
The bug escape rate is the percentage or ratio of defects that were missed by the team(s) and subsequently discovered by end-users or customers in a production environment after the software has been deployed.Â
It is typically calculated when we divide the number of bug found after release (escaped bugs) by the total number of bugs found (escaped bugs + bugs found before release) and multiply by 100. So if the team found 100 bugs, but after deploying to production customers report 10 additional bugs, the escape rate would be calculated as: (10 escaped defects) / (100 detected defects + 10 escaped defects) = 9%.
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Having a low escape rate is the primary goal. A low number indicates that the testing efforts were effective and successfully caught most defects before the public release. High escape rate suggests major issues with our processes, such as insufficient test coverage, incorrect testing environments, poor test prioritization, or a lack of focus on critical user paths.Â
In essence, the escape rate tells you how many bugs slipped past testing.
The bug escape rate is the percentage or ratio of defects that were missed by the team(s) and subsequently discovered by end-users or customers in a production environment after the software has been deployed.Â
It is typically calculated when we divide the number of bug found after release (escaped bugs) by the total number of bugs found (escaped bugs + bugs found before release) and multiply by 100. So if the team found 100 bugs, but after deploying to production customers report 10 additional bugs, the escape rate would be calculated as: (10 escaped defects) / (100 detected defects + 10 escaped defects) = 9%.
Â
Having a low escape rate is the primary goal. A low number indicates that the testing efforts were effective and successfully caught most defects before the public release. High escape rate suggests major issues with our processes, such as insufficient test coverage, incorrect testing environments, poor test prioritization, or a lack of focus on critical user paths.Â
In essence, the escape rate tells you how many bugs slipped past testing.
