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Time to RCA
metricThe elapsed time from closure of a Sev1 incident to delivery of a signed, accepted root cause analysis. Time to RCA measures the written deliverable, which is what an RCA SLA actually tests. It is distinct from MTTI, which ends at identification. Track it per incident and per severity against the committed window.
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Root causeContributing factorTrigger, propagation, failureCausal chainEvidence indexSev1 / Sev2Post-incident reviewBlameless postmortemKnown errorProblem recordCause codeCAPAMTTIMTTDMTTRRCA SLAService creditRFO (Reason for Outage)Change attributionService ownership mapCMDBTopologyTelemetry coverageAbstentionConfidence statementVPC deploymentAir-gappedData egressExpert podReplay bake-offOutcome-based pricingManaged serviceHuman-in-the-loop sign-offITSM