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: Henry Davis ( )
Date posted: Mon Sep 18 19:11:53 US/Eastern 2000
Subject: Single Bit Error Rate
There is a requirement that the single bit error rate for memory shall not exceed 25 per one million hours. The SBE shall be calculated using MIL-HDBK-217F, CN2. I also have information re environments, etc. The operating environment is 1 hour/day at 60,000 feet and 23 hours/day at sea level. For sea level I calculated FR based upon 217 and used the Failure Mode Distribution (FMD-91)information for a factor for failures from data bitlosses. Does anyone have any suggestions for the SBE calculations/derrivations at 60,000 feet? If so I plan on taking a weighted average of the numbers for the final calcualtion.


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