
In Part 2 of Beyond the Numbers, I explored how human reliability principles can be integrated into traditional reliability artefacts such as Reliability Block Diagrams (RBDs), Fault Tree Analysis (FTA) and Failure Modes, Effects and Criticality Analysis (FMECA). Those tools help us understand how systems fail and how different failure paths interact.
But reliability engineering does not end with failure analysis.
In practice, the outputs of FMECA flow directly into the Reliability Centred Maintenance (RCM) process, where failure modes are translated into maintenance strategies such as inspections, condition monitoring, restorations or replacements.
If assumptions about human performance are simplified during reliability analysis, those assumptions do not disappear. They are carried forward, and often amplified, when maintenance requirements are defined.
Maintenance is where reliability modelling becomes an operational commitment.
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