Category: Theory and definitions
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Time to failure
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.
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Thinking RCM
When attempting to maintain a large industrial facility we face a complex challenge. We search yet rarely discover a single silver bullet capable of subduing the beast. The fiend has a hundred thousand spikes with which to retaliate. Tens of thousands of failure modes stalk our physical assets. To win against so tenacious a foe…
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Non-rejuvenating events
By definition a Non-Rejuvinating Event (NRE) is an action that systematically affects condition monitoring value levels, but does not add “life” to (i.e. reduce the physical age of) the asset. For example, if immediately after greasing the bearing, there is a significant step drop in detected vibration levels, then the greasing activity should be accounted for…