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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: COLLIN Jean-Philippe (Jean-Philippe.Collin@ligeron.com )
Organization:LIGERON SA
Date posted: Wed Apr 5 11:36:08 US/Eastern 2000
Subject: relation between failure rate and lifetime
Message:
Who evaluate failure rate of components of a black box make s of a relay and electronic components when we have only the lifetime of the components as 200.000 operations ?


Reply:

Subject: relation between failure rate and lifetime
Reply Posted by: Jack Farrell (jfarrell@alionscience.com )
Organization: Reliability Analysis Center
Date Posted: Fri Apr 7 10:00:16 US/Eastern 2000
Message:
Failure rate usually refers to the random failures experienced during the useful life of an item. It is commonly predicted using Mil-Hdbk-217. The lifetime of 200,000 operations you refer to is a measure of an items life and is referred to as wear out. To calculate the failure rate for your black box you would need to perform a reliability prediction. If information about the components inside is limited a parts count type prediction would be your best bet.


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