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RCM: Choosing the Right Maintenance Task
Apply Reliability-Centered Maintenance logic to choose run-to-failure, on-condition, restoration, or redesign.
RCM: Reliability-Centered Maintenance
RCM takes each failure mode from your FMEA and asks: what is the right response? Not every failure deserves the same treatment.
The Decision Logic
- Run-to-failure — cheap, non-critical, no safety impact. Fix when it breaks.
- Time-based restoration — wear is predictable and age-related. Replace on schedule.
- On-condition (predictive) — failure is detectable before it bites. Monitor and act on finding.
- Redesign — the failure mode is unacceptable and no maintenance task fixes it. Change the asset.
Selecting Tasks
- Take each failure mode from the FMEA.
- Is there a detectable failure-finding interval? If yes, on-condition wins.
- Is the failure age-related and the cost of failure high? Use time-based restoration.
- If nothing works and the risk is high, escalate to redesign.
Tips
RCM forces honesty about where predictive helps and where it does not. Do not shoehorn condition monitoring onto failures that are truly random — redesign or stock spares instead.