Definition
How long it takes to reverse harm and return a person to their prior state. Low TTR is a signal of effective reversibility.
Targets & breach behavior. Measurement window: weekly p95; monthly median. Target / floor / ceiling: target ≤ 24h, floor ≤ 72h, ceiling 7d. Owner: Traceable Ownership (must have). Breach action: activate rollback lanes, switch to staffed remediation, or trigger safe pause with escalation. Public surface: receipt + time transparency with restoration ETA and decision artifact.