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: Tom Clark (tclark@sanera.net )
Date posted: Thu Jul 11 14:46:20 US/Eastern 2002
Subject: RAC FIT Rates
Message:
We have received some test reports from a DC-DC converter vendor. They show an MTBF of 3547773 hours with a total failure rate for the assembly of .281867 The reports are labeled with PRISM v1.3 and RAC. The standard for FIT rate is failures in 10^9 hours, however the failure rate here only makes sense if it is out of 10^6 hours. Does RAC do things differently, or is there some other explanation for this dioscrepancy? Thanks!

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