What will RCM analysis show when performed on critical assets with a strong (and a bit expensive) current maintenance strategy, with high levels of asset reliability performance?
- Majority of CBM and PM tasks already included in maintenance schedules;
- Failure mode coverage with the existing maintenance strategy – between 75% and 85%;
- Non-optimized task frequencies (some of them driven by fixed TAR schedules);
- A significant amount of tasks that belong to CBM are performed as PM (replacement/restore instead of condition monitoring);
- And the most significant – the demonstration if the asset is over-maintained (total number of failure modes, tasks, and task frequencies).
A recent project shows that the remaining fraction of failure modes not covered by the existing maintenance strategy consists of failures that can be managed successfully by:
- Re-Design of components or asset sub-units (ref. ISO 14224 hierarchy and terminology) – up to 60%,
- Scheduled PM tasks – up to 30%, and
- Failure Finding tasks – up to 10% of total new tasks identified.
