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: Wayne
Date posted: Fri Nov 29 10:37:21 US/Eastern 2002
Subject: MTBF or service life??
Message:
I often see supplier's specifications on things like for example a motor having an MTBF of 150,000hrs with a service life of 10 yrs. The MTBF greatly exceeds its service life. Is that possible? I thought that MTBF should be lower than service to make sense? So which figure do i use as my input for my reliability analysis of a complete system? MTBF or service life?

Previous reply

Reply:

Subject: MTBF or Service Life?
Reply Posted by: Ken
Date Posted: Wed Dec 4 8:41:22 US/Eastern 2002
Message:
Use MTBF in your analysis. Service life includes requirements for spares availability, depot support, etc., i.e., the item can be supported for the 10 year or other specified period when it does fail.

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