Category: Reliability Analysis
-
Real meaning of the six RCM curves
You may be wondering about the famous “RCM curves” shown below in Figure 1. They are the Age-Reliability behavior curves which graph the Conditional Probability of failure against age. A common question is the following. “For the 139 items covered in the Nowlan & Heap (UAL) study, for example, do these curves represent the real…
-
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…
-
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.
-
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…