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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: C.P. Chuah (c.p.chuah@sheffield.ac.uk )
Organization:University of Sheffield
Date posted: Tue Jul 1 10:29:56 US/Eastern 2003
Subject: reliability of electronics board
Message:
Can anybody tell me what is the best method and most representative to evaluate the reliability of an electronic boards assuming i have all the available failure rates of the components in use ? I have calculated it by just using the series model where it is assumed that one of the electronic component fails the board fails. But i am not sure if that represents a good reliability methodology as i am no expert in reliabilities. Thank you.


Reply:

Subject: Reliability Analysis
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAC
Date Posted: Wed Jul 9 13:54:23 US/Eastern 2003
Message:
The series reliability calculation that you described is effective if all components that fail cause some degradation in the performance that is unacceptable. This is a worst case estimate of the product reliability. If there are components that do not cause unacceptable performance when failing, then you need to perform a model simulation of the configuration. Degraded conditions that are not significant can be determine via the performance of a part failure mode analysis.


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