Forum: Reliability & Maintainability Questions and Answers

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Posted by: John (kelsmit@aol.com )
Date posted: Fri Jan 25 15:36:43 US/Eastern 2002
Subject: Unconfirmed Field Failures
Message:
When testing returned units (i.e. circuit cards) that have failed at customer sites, occasionally the reported failure or any failure can not be duplicated. Is there any information or rule of thumb regarding these unconfirmed field failure rates? I would be interested in any opinions or experiences.

Replies: (list all replies)
Unconfirmed Field Failures
Allan Brown Mon Jan 28 15:12:55 US/Eastern 2002
NFF Failures
Joe Dzekevich Fri Feb 8 12:42:21 US/Eastern 2002
Unconfirmed Field Failures
David A. Douthit Thu Mar 7 21:27:53 US/Eastern 2002
Unconfirmed Field Failures
John Turnbull Fri Mar 15 5:55:30 US/Eastern 2002

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Posted by: LEE (DEVILHOSEUNG@HOTMAIL.COM )
Organization:GEORGIA TECH
Date posted: Wed Jan 16 13:53:31 US/Eastern 2002
Subject: GPS
Message:
DOES ANYBODY KNOW WHERE I CAN GET THE GPS FAILURE RATE USING FOR HELICOPTER?

Replies:
GPS Reliability
B.W.Dudley Mon Jan 21 15:01:25 US/Eastern 2002

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Posted by: Jim Jones (jcjones@link.com )
Organization:L3 Communications
Date posted: Fri Jan 11 7:30:21 US/Eastern 2002
Subject: Gas Springs
Message:
I am looking for the MTBF for nitrogen charged gas springs (GF--30 Deg C), or a source for calculation of MTBF. We are using heavy duty gas springs to lift a system to various heights (prior to pinning) as part of the system function.

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Posted by: Johnson Wood (wuxiangping@huawei.com )
Date posted: Thu Jan 10 21:57:01 US/Eastern 2002
Subject: RF components reliability
Message:
I think the RF(Radio Frequency) components must have some special reliability requirements than other common devices, so are there any references on RF reliability?

Replies:
RF components reliability
Allan Brown Mon Jan 28 15:16:25 US/Eastern 2002

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Posted by: Richard Smith (atari_400@hotmail.com )
Date posted: Mon Jan 7 15:00:26 US/Eastern 2002
Subject: Reliability Testing Comparison (RDGT/HALT/HASS/PRAT etc.)
Message:
Does anybody know of a website or reference that discusses or compares the benefits or disadvantages of the following types of reliability testing:
- Reliability Development Growth Testing (RDGT) - HALT/HASS (Highly Accelerated Life Test/Highly Accelerated Stress Screening) - Production Reliability Acceptance Testing (PRAT) - etc. What I am looking for is something that would help decide when one method would be more advantageous or cost effective over another, and would possibly yield meaningful results.

Replies: (list all replies)
Re: Reliability Testing Comparison (RDGT/HALT/HASS/PRAT etc.)
Gary Sunada Mon Jan 14 16:23:08 US/Eastern 2002
HALT and HASS
Kirk Gray Fri Feb 8 16:00:11 US/Eastern 2002

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