Defect ratio

What it measures

The share of merged PRs classified as bug fixes each week, as a percentage.

Why it matters

Defect ratio is the quality counterweight to the speed panels. A team shipping faster while its bug-fix share climbs is borrowing against quality.

How to read it

• Read it alongside Throughput and Cycle time — speed and this number tell the story together.
• Classification uses PR labels first, then title patterns; it is a heuristic, not a bug tracker.

Anti-blame

A team-level percentage. Which PRs were fixes is never tied to who wrote them.

Common misreads

A rising defect ratio is not automatically bad — it can mean more fixing of old issues, not more new bugs. Investigate before concluding.