Week #12: (4/8-12) MTBF & Project Discussion

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rjagodowski
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Joined: Fri Sep 04, 2015 6:59 pm

Week #12: (4/8-12) MTBF & Project Discussion

Post by rjagodowski »

This morning we'll spend a bit of time discussing MTBF (Mean Time Between Failures) and related issues, then discuss project related issues.

MTBF from Wikipedia


Some typical MTBF numbers

Western Digital Hard Drive Data Sheet showing MTBF.

Here's a link to MTTR, MTBF & MTTF: A Guide to Failure Metrics.

This is a great PDF document on Lessons in Industrial Automation and it is updated frequently (current version is March 2019) and it's FREE. It is a large document at almost 3,300 pages long, so please don't print it. The part we will be looking at is section 32.3 Practical Measures of Reliability beginning on page 2633. Section 32.3.2 (page 2639) shows the common failure graph knows as the bathtub curve to relate how the likelihood of failures varies over the expected product lifetime.
Lessons in Industrial Instrumentation_2019-03.pdf
(60.65 MiB) Downloaded 195 times
You can always download the latest edition of this document here.

Another consideration which is a growing concern in manufacturing is that of "counterfeit components". This paper from Cyclops Electronics discusses the importance and prevalence of this problem.
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