Week #12: MTBF & Project Discussion

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

Week #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

U.S. Department of Energy LED Lighting Reliability Dated 2013.

MTBF vs AFR (Annualized Failure Rate) from Seagate (hard disk drive manufacturer).

Seagate Ironwolf drive datasheet showing a 1,000,000 hour MTBF for this series of hard drive.

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 September 2018) and it's FREE. It is a large document over 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_2018-0912.pdf
(60.65 MiB) Downloaded 160 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.



PROJECT REPORTS:

A formal assignment sheet will be created and posted in Blackboard by Monday, April 19, 2021 describing the details & content required in the report. Your report will be based upon the various EET-265L Lab tasks and investigations you performed throughout this semester. You should begin organizing and creating a collection of the work you have done in EET-265L sessions. These should include the physical work you have done here on campus as well as discussions online with Prof. Chuck Ruotolo. More specifics will be provided in the description to be posted on Blackboard.
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