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: Floyd Kreuze
Date posted: Fri Sep 3 15:31:42 US/Eastern 1999
Subject: BIT Demo Accept/Reject Criteria
What do respondees suggest as a good way to determine a set of accept/reject criteria for BIT Demo Testing? Is this topic covered in any technical book or article?
Subject: BIT Demo
Reply Posted by: Bruce Dudley
Organization: Reliability Analysis Center
Date Posted: Thu Sep 16 9:16:59 US/Eastern 1999
One of the "old" Military Standards called Maintainability Verification and Demonstration (MIL-STD-471A Notice#2) has an evaluation criteria for confidence levels of testability attributes. In this section, the test results are subjected to accept reject through the use of confidence levels. The general test evaluation equation is: P(upper confidence) = P(observered estimate of population) - Z(co-efficient dependent for confidence interval desired) x sq/rt of P(1-P)/W(saample size). The accept citeria would be a calculation that is equal to or greater than the requirement / goal.