Category: Reliability Analysis
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Monte Carlo Simulation
In the context of maintenance and reliability, “simulation” refers to Monte Carlo Simulation (MCS). MCS generates and uses a stream of random numbers to represent failure (cumulative) probabilities and repair duration (cumulative) probabilities. It substitutes these random numbers for F(t) in the cumulative failure probability equation (for example equation 1 below) and solves for t. It repeats…
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Myths about RCM in heavy mining equipment
Myth 1: Within the HME community, RCM seems to have been labeled “a waste of resource, time and effort” …, Fact: This happens where RCM is treated as a one-time project rather than a living process integrated into everyday maintenance work order activity. Here are some of the reasons why RCM projects may not provide…
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Sample selection
A good sample should include both good and bad actors. For example, pumps that fail frequently as well as those that do not fail or fail infrequently should be included. This ensures an unbiased sample. Normally the analyst takes two points in calendar time a few to several years apart. Then within that time window…
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The CMMS barrier to RCM
One company tried to connect its CMMS with its RCM program. Not just the usual upload of the RCM strategy from the RCM application to the CMMS but a more organic day-to-day integration of the two processes. However, they ran into difficulties. The CMMS being based in a relational database tries to codify as much…
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Free text on the work order
Information technology has changed the way we work, but not the internal workings of our minds. Another 10 or 100 generations will pass before the human brain evolves the capacity to describe complex situations by selecting items from drop down lists. What exactly is the purpose of free text on the work order? A work…