Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

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

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Posted by: andrew Comons
Date posted: Thu Mar 14 20:25:29 US/Eastern 2002
Subject: Reliability With degraded Mode of Operation
How does the industry handle a MTBF calculation whereby, a mission (single system)may permit operation in a degraded mode? Assuming that a failure did not prevent the degraded mode operation, how would the MTBF calculation be made? For the designer's specification, do I have to specify two different MTBF's - one MTBF for the entire system and another MTBF for degraded system? Or do I specify my maximum mission reliability as the minimum for all hardware relevant to the degraded state? I cannot find much written on this degraded scenario.


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