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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: Perplexed
Date posted: Tue Feb 4 10:32:46 US/Eastern 2003
Subject: Failure Free Operating Period
Message:
Can anyone help me with converting a requirement for a “Failure Free Operating Period” (FFOP)into a failure rate.


Reply:

Subject: Failure Free Operating Period
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAC
Date Posted: Tue Feb 18 13:10:43 US/Eastern 2003
Message:
Failure free operating periods [FFOP] of time means that no failures occur [ZERO FAILURES] during this interval. Therefore, this FFOP translates to a failure rate of ZERO. This assumption, of course, means that there are no defects and no chance failures. FFOP times are VERY difficult to design and meet, best of luck with your program. The Reliability Toolkit, Commercial Practices Edition has explanations on durability, failure free operation and end of life considerations.


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