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Defect validity and reopen rate
Check how many reported defects are real and how many fixes fail retest, per sprint or release.
Quality & testingHow it's worked out
- Rejection = (duplicates + not a defect) ÷ reported. Reopen = reopened ÷ fixed and retested
- Same sprint or release
NoteHigh rejection wastes triage time and often means unclear requirements or test data. A high reopen rate means fixes are not tested by developers before handover.
Source: ISTQB defect management; common QA metric definitions
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