Reference for tracking MTTR (Mean Time To Recovery) / MTBF (Mean Time Between Failures) / MTTD (Mean Time To Detection) / MTTA (Mean Time To Acknowledge) - incident-record schema, calculation formulae, dashboards-as-code, target-vs-actual alerting. Aligns with ITIL incident management + ISO 20000 + Google SRE incident response chapter. Use when incident reporting is being stood up from scratch, or when an existing MTTR / MTBF dashboard reports numbers nobody can reproduce or agree on the definition of.