Reduce the time from failure to verified production restart.
Mean time to repair (MTTR) tracks the average time required to restore failed equipment to service. Recovery time can include detection, diagnosis, access, parts retrieval, repair, testing, reset, and production verification.
Measure failure and recovery in production terms.
Failure frequency, repair duration, spare parts, diagnostics, planned maintenance, and root causes all influence how much scheduled production time becomes reliable uptime.
Reduce repeat failures and shorten recovery.
The strongest maintenance improvements either make failures less frequent, make recovery faster, or prevent the same failure mode from returning.
CRIT-AShorten Diagnosis
Clear alarms, HMI diagnostics, drawings, fault history, and known failure modes reduce time spent searching for the problem.
Related Guide →CRIT-BImprove Access and Spares
Maintenance access, correct tools, critical spare parts, and component labeling can shorten hands-on repair time.
Related Guide →CRIT-CStandardize Recovery
Documented restart and verification steps reduce uncertainty after repairs and help avoid repeated faults during recovery.
Related Guide →CRIT-DSeparate Waiting from Repair
Parts delay, approval delay, access delay, and technician response should be distinguished from the actual repair task.
Related Guide →Visualize reliability performance over time.
These diagrams focus on reliability trend and the operating cycle between failure, repair, verification, and return to service.
Reliability trend.
Track whether failures are becoming less frequent or repair time is shrinking after corrective work.
Maintenance loop.
Failure information should feed back into inspection, service, spare-parts planning, and corrective action.
Relevant maintenance and repair resources.
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