SRC Forum - Message Replies
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
Posted by:Marc Hughes
Date posted: Wed Jul 14 14:52:22 US/Eastern 1999
Subject: Confidence Limits on Reliability Predictions
I have been asked about confidence limits on failure rates calculated using MIL-HDBK-217 & Bellcore, using the NPRD and vendor data. My experience in determining confidence limits is based on statistical type testing as described by MIL-STD-781 and not based on the reliability prediction.
The requestor is continuing to state that you can determine confidence intervals on reliability calculations without test data. Do you know of a method, or a publication that would help?
I thought at one time there was a paper written concerning confidence limits on the formulas presented in MIL-HDBK-217 since these formulae are based on test data of components?
Subject: question on RADC-TR-89-299
Reply Posted by: KH, Lee
Date Posted: Mon Aug 28 5:10:38 US/Eastern 2000
Hi, nice meet you!
With my starting reliability analysis job for 2 years,
I have been using the Reliability Toolkit published by RAC
for my reference book.
Especially I am interested in translation to predicted MTBF
to field MTBF and use the operational parameter translation
identified in appendix A.
But there is no specific direction for R(f) selection.
I happen to know that it may be included in the Operational
Parameter Translation version 2, which can be founded in
the table J.4-1 of the Reliability Toolkit.
I would like to ask that I can get the Reliability and
Maintainability Operational Parameter Translation 2
(RADC-TR-89-299, Vol 1 & 2), AD No.ADB141960L and
If I can buy it, please let me know the price.
Thank you for your effort in advence.
(email id email@example.com)