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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: Johnson Wood (wuxiangping@huawei.com )
Date posted: Tue Mar 12 1:54:45 US/Eastern 2002
Subject: Confidence Level of Reliability Calculation
Message:
For example, there are tow components in a certain circuit. The failure rate for each of the components are given with a confidence level. One is 40 FITs, the confidence level is 80%, and another one is 15 FITs, the confidence lever is 60%. When I sum the failure rates of these tow components up to calculate the reliability of the circuit, what is the confidence level for the result?


Reply:

Subject: Confidence level
Reply Posted by: Jean-Marie CLOAREC (Jean-Marie.Cloarec@ligeron.com )
Organization: LIGERON SA
Date Posted: Thu Mar 14 4:24:27 US/Eastern 2002
Message:
You can't sum the elementary confidence level. The best to do is a Monte-Carlo simulation and try to find the mathematical law.


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