# MTTR (Platform-Run) — Definition of Success

> KPI: MTTR (p95)
> Target: < 60 seconds

**What this number means:** the time from a platform-run failure
(apply.failed) to a successful retry. This is platform-run MTTR, not
infra-incident MTTR (which requires an incident detection system that
Nova doesn't have yet — deferred).

**How it's computed:** p95 of `successful_retry.time − failed_run.time`
across all runs that failed then succeeded.

**What "good" looks like:** < 60 seconds means the platform recovers
from a failed run in under a minute, 95% of the time.

**What's deferred:** infra-incident MTTR (anomaly detected → healed)
requires an incident detection/remediation system (self-healing
velocity). That's a future emitter.