Tag: John Moubray
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RCM boundaries and Living RCM
In performing your RCM analysis on this butterfly valve, you decided to treat the hydraulic system as a separate analysis. You drew the boundary in such a way that the cylinder-actuator belongs to the hydraulic system and not to the valve. That is perfectly legitimate. You can draw the boundaries in any way that you…
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Conditional probability of failure vs. hazard rate
This slide presentation describes the basics of the age reliability relationship. It clarifies the difference between the Failure Rate function and the Conditional Probability of Failure. An amusing story about confusing Failure Rate and Conditional Failure Probability is told in this post. John Moubray, as a warning against being too sure of oneself, used to…
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How much detail?
How many failure modes should we consider? When should we group failure modes to avoid excessive detail. John Moubray pointed out that this is one of the most difficult questions in RCM. And it comes up repeatedly in day to day history capture (Living RCM) as well… How much detail? on Prezi