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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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Original Message:

Posted by: Troy
Date posted: Thu Oct 28 15:28:25 US/Eastern 2004
Subject: Attribute Testing
I desire to use attribute testing to determine reliability at a given confidence level. Where can I get information regarding formulas used do derive reliability?


Subject: Attribute Testing
Reply Posted by: bwd ( )
Organization: RAC
Date Posted: Tue Nov 2 14:09:01 US/Eastern 2004
In general there are two types or manners that data are collected and evaluated. Testing by attributes, in which a device is classified quantitatively, that is, as a success or as a failure, is one method. The other method is testing by variables, in which the output of a device is measured along a continuous numerical scale and is described in terms of its position along the scale. So, if your testing is merely classified as acceptable or unacceptable, then the demonstration test is an attribute test. Fixed sample and sequential tests are two of the methods usually employed in this test concept. The detail test equations and processes are included in section 8.4.2 of MIL-HDBK-338B Electronic Reliability Design Handbook. This handbook is available on the web at:

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