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: Chris Guebert
Date posted: Wed Jul 25 15:14:49 US/Eastern 2001
I can't find anything that tell me how to calculate MTBR. Any help would be appreciated. Is there a formula?
Subject: Reliability Definitions MTBR
Reply Posted by: B.W.Dudley
Organization: Reliability Analysis Center
Date Posted: Thu Jul 26 10:27:48 US/Eastern 2001
The definition for MTBR (mean time between removals) is a measure of the product reliability parameter related to demand for logistic support. The total number of system life units divided by the total number of items removed from that product during a stated period of time is the MTBR value. This term is defined to exclude removals performed to facilitate other maintenance and removals for product improvement. As you have an MTBF evaluation, you must identify all the failures in this evaluation that will result in removal action, which means you probably need to have access to an FMEA analysis. Excluding the non-removal failure rates should result in a prediction of MTBR..