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4.6Metrics That Actually Matter vs Vanity Metrics
Vanity Metrics (Look Good, Mean Little)
| Metric | Why It's Vanity |
|---|---|
| "We have 5,000 automated tests" | Count means nothing without pass rate, coverage, and relevance |
| "100% code coverage" | Coverage does not guarantee test quality -- tests can cover code without asserting anything |
| "Zero bugs found" | Could mean great quality or could mean insufficient testing |
| "We test on 50 devices" | Device count matters less than covering the devices your users actually use |
| "We execute 200 tests per day" | Execution volume without defect detection rate is meaningless |
Actionable Metrics (Drive Decisions)
| Metric | Why It's Actionable |
|---|---|
| Defect escape rate | Tells you if testing is catching bugs before users see them |
| Flaky test rate | Tells you if the test suite is reliable enough to trust |
| Bug fix cycle time | Tells you if the team can respond to quality issues quickly |
| Risk coverage | Tells you if you are testing the right things |
| Customer-reported defects (trend) | Tells you if quality is improving over time |