Forum: Reliability & Maintainability Questions and Answers

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Posted by: Julien NICO (jnico@zodiac.com )
Organization:Zodiac
Date posted: Thu Feb 13 4:11:02 US/Eastern 2003
Subject: Overhaul
Message:
We are developping a system for aircraft made of several component (electronic,mechanic, pneumatic).
One of this component (an air compressor) has an ovberhaul period. To build my system MTBF, shall i use the overhaul period or the MTBF (what can be the mtbf of an overhaul component?). If i have to use the MTBF, what is the interest of the overhaul, beacause it is sensed to extend the life of the component.

Replies:
Overhaul Reliability
BWD Tue Feb 18 13:59:47 US/Eastern 2003

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Posted by: Jim Jones (jcjones@link.com )
Organization:L3
Date posted: Tue Feb 11 12:53:30 US/Eastern 2003
Subject: Durability definition
Message:
I am in need of a definition of both electrical durability and mechanical durability. In what ways is the durability of an item tied to material used in the design? How does durability differ from normal wear-out?
Thanks

Replies:
Durability
B.W.D. Tue Feb 18 12:55:57 US/Eastern 2003

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Posted by: Perplexed
Date posted: Tue Feb 4 10:32:46 US/Eastern 2003
Subject: Failure Free Operating Period
Message:
Can anyone help me with converting a requirement for a “Failure Free Operating Period” (FFOP)into a failure rate.

Replies:
Failure Free Operating Period
BWD Tue Feb 18 13:10:43 US/Eastern 2003

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Posted by: June
Date posted: Thu Jan 30 22:06:17 US/Eastern 2003
Subject: Early Failure Rate
Message:
For early failure rate. why is number of failures (fpm) corrected using 60% confidence level (using poisson statistics)?
a) Why not 90% confidence level, etc b) Why poisson (since for reliability data, it is mostly derived from Weibull, exponential distribution) http://www.philipslogic.com/quality/efr/

Replies:
Confidence Level
Jorge L. Romeu Mon Feb 3 10:53:30 US/Eastern 2003

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Posted by: Gupta (tg.gupta@tbg.tvse.co.in )
Organization:TVS-Electronics
Date posted: Wed Jan 29 10:02:08 US/Eastern 2003
Subject: Reg: HandBook
Message:
Dear,
What HandBook I need to refer for Mechanical, Electro-Mechnical Failure Rate. with regards, TGK Gupta

Replies:
Mechanical Failure Models
BWDudley Wed Jan 29 13:29:34 US/Eastern 2003

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