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: Tony Nguyen (anhvana@yahoo.com )
Date posted: Tue Dec 16 11:04:42 US/Eastern 2003
Subject: MTBCF
Message:
Is there a formula to calculate the MTBCF from typical MTBF/FITs data. Please help. Thanks

Reply:

Subject: MTBCF Calculation
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAC
Date Posted: Wed Dec 17 9:29:43 US/Eastern 2003
Message:
The definition for MTBCF is the mean time between critical failure. This value has to be determined through the modeling of the unit or system so that one can determine which part failures cause mission loss. The only formula that would work as is, is if the loss of all parts cause mission loss then you could apply a one to one ratio. For modeling guidance, I would suggest that you review our reliability toolkit or MIL HDBK-338 Reliability Design Handbook.