Life Cycle of a Defect

What is a defect life cycle?

A defect life cycle is the movement of a bug or defect in different stages of its lifetime, right from the beginning when it is first identified till the time is marked as verified and closed.
Depending on the defect management tool used and the organisation, we can have different states as well different nomenclature for the states in the defect life cycle.


Life cycle of a Defect or Bug
  • New - A bug or defect when detected is in New state
  • Assigned - The newly detected bug when assigned to the corresponding developer is in Assigned state
  • Open - When the developer works on the bug, the bug lies in Open state
  • Rejected/Not a bug - A bug lies in rejected state in case the developer feels the bug is not genuine
  • Deferred - A deferred bug is one, fix of which is deferred for some time(for the next releases) based on urgency and criticality of the bug
  • Fixed/InTest - When a bug is resolved by the developer it is marked as fixed and assigned to the tester
  • Reopened - If the tester is not satisfied with issue resolution the bug is moved to Reopened state
  • Verified - After the Test phase if the tester feels bug is resolved, it is marked as verified
  • Closed - After the bug is verified, it is moved to Closed status.