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MTTI
metricMean time to identify: the average time from detection of an incident to identification of its cause. MTTI sits between MTTD and MTTR and is the metric most directly improved by better root cause capability. Because some vendors use MTTI to mean time to investigate, always state the definition when you report it.
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More terms.
Root causeContributing factorTrigger, propagation, failureCausal chainEvidence indexSev1 / Sev2Post-incident reviewBlameless postmortemKnown errorProblem recordCause codeCAPAMTTDMTTRTime to RCARCA 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