SRC Forum - Message Replies

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

Original Message:

Posted by: Laurens
Date posted: Tue Jun 10 11:26:50 US/Eastern 2003
Subject: Modern MTBF calculations
Message:
Hi, I have recently been assigned to develop a new product. Client's require 25 year MTBF, but do not specify the calc method. Looking through our copy of MIL HDBK 217F and performing calculations shows that the product wouldn't meet this (or even come close). What is considered a more up-to-date method of reliability prediction (esp. for items like ceramic chip caps)?

Reply:

Subject: Prediction Models
Reply Posted by: bwd (bdudley@alionscience.com )
Organization: RAC
Date Posted: Wed Jun 11 14:12:32 US/Eastern 2003
Message:
MIL-HDBK-217 has not been updated for over ten years. This means that many models are not up to the current technology. The RAC's PRISM program is newly developed and accounts for much of the current device technology. Models for chip capacitors and chip resistors are included in the PRISM list. Another source that has chip capacitors is Telcordia. The prediction model, SR-332, has most electronic components listed.

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