A short video with Jeff Shiver CMRP on how equipment fails from an RCM perspective.


Hello. I'm Jeff Shiver, Managing Principal with People and Processes. Today I wanted to share some thoughts with you regarding how equipment fails.

If you know anything about reliability-centered maintenance, you know it started in 1968 with a study done by Nowlan and Heap with the air craft industry. What they actually found out is there were actually six failure curves. Prior to that, what we had always done is we had based everything on time-based maintenance. This is why this effort was so important, because for example if I go to a bottling company, they might run this 100 days of summers for example and then they just go in and start overhauling everything, doing schedule discards or schedule restorations as an example.

Well what we found out from Nowlan and Heap's stuff is that actually only 11% to 20% of all components actually fail within some predictable wear out zone for example, or reach the wear out zone. 80% of them had actually no real wear out zone. What this means for us is the condition based maintenance approaches are much more effective and much more cost effective than doing time based maintenance because 80% of them, 80% to 89% of the components in the air craft industry specifically, actually have no wear out zone so you can't use time based maintenance on it. You have to use condition based and that translates to industrial maintenance and facilities maintenance as well.

I hope you enjoyed the tip. Jeff Shiver, People and Processes. Have a great day.