Forum: Reliability & Maintainability Questions and Answers

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Posted by: Zhili Kuang (kzlkp@163.net )
Organization:CEPREI
Date posted: Fri Oct 25 1:13:29 US/Eastern 2002
Subject: High Reliability
Message:
Hello!
For high reliability equipment, who can offer the information (paper, book, reference etc.) about the HALT & HASS theory and practice, and the evaluation method of accelerated life testing (ALT) about assemble & equipment. Thanks.

Replies:
HALT/HASS Testing
BWD Wed Oct 30 14:39:05 US/Eastern 2002

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Posted by: Kim Lae Won (laewonee@rotem.co.kr )
Organization:ROTEM company
Date posted: Thu Oct 24 3:54:28 US/Eastern 2002
Subject: MTTR Allocation
Message:
Hi~
I want to know whether the following MTTR allocation is possible and if possible, want to know the appropriate methods. Thanks for your kind help previously. -------------------------------------------------------- Allocation requirements -------------------------------------------------------- The Contractor shall allocate MTTR requirements for the three active CM time intervals for each subsystem. (sample) *system : railway rolling stock *subsystem -Couplers & Draft Gear : MTTR=2.2 & Mmax90%=4.86 -here active CM time=fault isolation time + remove and replace/repair tiem + functional checkout time --------------------------------------------------------

Replies:
maintainability allocation
bwd Mon Oct 28 14:59:22 US/Eastern 2002

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Posted by: Kenny
Date posted: Sun Oct 20 7:30:27 US/Eastern 2002
Subject: ESS
Message:
I would like to clarify what is the recommended number of cycles for ESS? I know that by overspecifying the number of cycles will go into the useful life of the equipment so is there a guideline to tell us what's the limit? And for temperature ESS what is the acceptable rate of change of temperature?

Replies:
ESS Testing
bwd Tue Oct 22 8:24:24 US/Eastern 2002

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Posted by: Teng YL (tengyl@cet.st.com.sg )
Organization:CET Tech.
Date posted: Mon Oct 14 6:01:07 US/Eastern 2002
Subject: reliability modelling for comms network (star topology configuration)
Message:
Hi,
Recently, I faced one problem on the reliability modelling for the communcation network (for star topology configuration). The sinario is: 1. The network consists of 1 centre site + 4 remote sites A,B,C&D. 2. The configuration on all remoted sites are same. 3. Any remoted site failure doesn't affect the operation of other r-sites and centre. The question is - the system availability of this network shall consider : a. all sites (ie. 1+4), or b. 1 centre + 1 remote site. (ie.1+1) c. 1 centre + 2 remote sites in nCr (4C2) (ie. 1+2) d. others, pls advise. Thank you. Teng YL

Replies:
Network reliability
Larry George Thu Oct 31 16:44:45 US/Eastern 2002

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Posted by: Ted Webb (twebb@gil.com.au )
Organization:Boeing Australia
Date posted: Fri Oct 18 12:34:11 US/Eastern 2002
Subject: Aging Aircraft 2000 web site
Message:
I am attempting to view the conference proceedings list for the Aging Aircraft 2000 conference held in St. Louis.
Anyone know of how/where to see the Aging Aircraft 2000 conference proceedings list?? Thank you

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