Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and AnswersTopic Posted by: Reliability & Maintainability Forum (firstname.lastname@example.org )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Original Message:Posted by: Tom Clark (email@example.com )
Date posted: Thu Jul 11 14:51:47 US/Eastern 2002
Subject: Backplane Reliability Models?
I would like to know standard techniques used to model the reliability of a backplane. Since a backplane is not easily replaced, the MTTR is high. This means the FIT rate must be extremely low in order to show a reliable system may be built with that backplane. However, using the SR-332 standard 0.2 FITs per pin, a backplane with many high density connectors can quickly accrue FITs. The connectors I am using are rated for 200 matings. It seems unlikely that they will encounter more than 20 matings in the life/mission of the product. Can I use this information to change how I model the backplane? From looking at data shared by other companies, there is clearly a standard way to derate the FITs to show the backplane is ultra reliable (as it should be).....