Author Archives: Murray Wiseman
Effects
In most CMMSs where an RCM functionality has been introduced, the Effects tend to be short single phrases rather than narratives as suggested in the Moubray and SAE JA1011 standard. Effects according to the Moubray/JA1011 viewpoint include what happens at … Continue reading
Confidence in predictive maintenance
Without a mechanism to evaluate a Condition Based Maintenance (CBM) program’s evolving performance CBM activities will degenerate to “busy work”. Data will continue to be collected, manipulated and filed as a matter of routine. To counter this tendency towards apathy, … Continue reading
What is the scale parameter?
In Weibull analysis, what exactly is the scale parameter, η (Eta)? And why, at t = η , will 63.21% of the population have failed, regardless of the value of the shape parameter, β (Beta)? η (Eta) is called the … Continue reading
Variations in a sample
How do we account for variation in design or operating context when performing reliability analysis and building CBM optimization models, for example: Identical equipment working in different operational contexts – can they be treated as a single group of similar … Continue reading