Forum: Reliability & Maintainability Questions and Answers

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Posted by: Richard Smith (atari_400@hotmail.com )
Date posted: Fri May 25 14:27:59 US/Eastern 2001
Subject: SMT Ferrite Beads - What are people using in MIL-217 and Bellcore 332 Predictions ??
Message:
Can anybody provide me with a suggestion for a suitable component to use in a MIL-HDBK-217 or Bellcore TR-332 reliability prediction that would cover a surface mount ferrite or ferrite bead ? Unless I have overlooked something, so far I have not found anything similar apart from possibly a chip resistor as a very loose approximation.
Thanks, Richard.

Replies:
Ferrite Bead Reliability
Bruce Dudley Tue May 29 15:16:18 US/Eastern 2001

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Posted by: Alex Troya (troya@solarturbines.com )
Organization:Solar Turbines, Inc.
Date posted: Wed May 23 0:59:58 US/Eastern 2001
Subject: Improving MTBF
Message:
I am doing a reliability study for a standby generator control system. I learned that one way to reach the target MTBF is by increasing the testing frequency. The formula I found to calculate the testing factor is MTBF/2 * target MTBF. The results seem dubious - can you validate this formula?
Thank you.

Replies: (list all replies)
Improving MTBF
Jim Smith Thu May 24 16:58:05 US/Eastern 2001
Improving MTBF via Testing
Edward Sherwin Tue May 29 15:03:30 US/Eastern 2001

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Posted by: Jim Smith (jamsmi@ballard.com )
Organization:Ballard Generation Systems
Date posted: Tue May 22 18:29:07 US/Eastern 2001
Subject: Reliability of Engine Driven Gen Sets
Message:
Do you have any reliability information, that you can share, on the reliability of engine driven generator sets, in the power range 50 to 100 kW? I need to get a general idea of MTBF, MTTR and preventive maintenance requirements for this type of installation.
Thanks.

Replies:
Generator Reliability
Robert Arno Wed May 23 14:18:34 US/Eastern 2001

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Posted by: Klaus Denkmayr (klaus.denkmayr@avl.com )
Organization:AVL
Date posted: Thu May 17 8:40:12 US/Eastern 2001
Subject: literature on Design for Reliability
Message:
Hi,
can anyone recommend a book on design for reliability? It should cover mechanical design issues. Thanks in advance Klaus

Replies: (list all replies)
Recommend Texts
Patrick Hetherington Thu May 17 9:16:41 US/Eastern 2001
Design for Reliability
Barry Ma Thu May 17 11:31:39 US/Eastern 2001

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Posted by: Jon Hisey (jon.hisey@psion.com )
Organization:Psion Teklogix
Date posted: Wed May 16 14:35:34 US/Eastern 2001
Subject: Headset MTBF
Message:
I am looking for any information illustrating the calculation of MTBF for a headphone / microphone assembly. Or how others are classifying these devices according to Mil HDBK 217 F

Replies:
Microphone/Headset Reliability
Bruce Dudley Mon Jun 4 12:15:25 US/Eastern 2001

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