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10.6Metrics for the Correlation Framework
Track these metrics to measure the effectiveness of your test-production feedback loop:
| Metric | Description | Target |
|---|---|---|
| Incident coverage rate | % of incidents covered by existing tests | > 70% |
| Prediction rate | % of incidents preceded by a test failure | > 30% |
| Test gap closure time | Days from incident to new test covering the gap | < 14 days |
| Dead weight ratio | % of tests that have not failed in 6 months | < 30% |
| Test suite growth rate | New tests per quarter (should plateau, not grow indefinitely) | Decreasing |