My only fear of death is reincarnation.

Tupac Shakur

What is a Defect Life Cycle?

Defect life cycle is the journey of a defect, as it passes through various states, through during its lifetime. Sometimes also called Bug Life Cycle, it varies with organizations, methodologies and tools.

The purpose of having a well-defined life cycle is to create a process that improves communication, assigns responsibilities and makes tracking easier.

From the above diagram, we can see the stages and their flow. Every step has a responsible person and an action to be performed.

Whenever a defect is reported, it is in this state.
The person responsible for verifying the defect has acknowledged that it is indeed a defect.
The person responsible for verifying the defect has indicated that it is not a defect. A reason is usually specified. The reason could be that it may not be a defect at all, it could be a duplicate, or it may be an enhancement request.
A developer has been designated to fix this bug.
The developer has fixed the bug, and it is ready for testing.
The fix has been tested and found to be not working or causing other defects.
The fix has been tested and certified as working.
This state indicates all processes related to this bug have been completed, and no further action is necessary. In our company, this state means that the QA team has added a regression test case, and the documentation team has updated the release notes.
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