Forum: Reliability & Maintainability Questions and Answers
Posted by: Henry Davis
Organization:Honeywell DSES -Albuquerque Operations
Date posted: Fri Apr 23 15:32:44 US/Eastern 2004
Subject: Reliabilty Prediction for Flash Disk & solid state Disk storage Solution
I have a need to develop a reliability prediciton MTBF for a 5 gigabit Flash based disk storage unit. The supplier has a Bellcore Issue 6, Method I, Case 3 prediction, but I don't know how to translate this to something more aligned with PRISM or a modified 217F, CN2 prediction. Any assistance would be appreciated on this.
Posted by: asher (asgaleen@KLA-Tencor.com )
Date posted: Tue Apr 20 6:38:09 US/Eastern 2004
Subject: Optical Equipment Reliability Prediction
I am looking for publications/tools for reliability prediction to optical systems
Posted by: SP
Date posted: Mon Apr 19 9:13:57 US/Eastern 2004
I am undetaking a FMECA and am trying to determine as to whether or not the criticality analysis (Severity of failure v. Probability of failure matrix)takes into account equipment that has redundancy or does it look at the failure of the item as a stand alone item and does not take into account the item having redundancy?
I hope this makes sense! Thanks for any advice.
Posted by: asphil
Date posted: Fri Apr 16 1:51:19 US/Eastern 2004
Subject: Thermal factor estimation
When using MIL-217, we have to enter thermal parameter.
Although I calculate temperature rising for IC, I can't calculate it for passive components. How should I do for this?
Posted by: Sadat (sadath@nortelnetworks )
Date posted: Wed Apr 14 16:23:25 US/Eastern 2004
Subject: Error Bars on System Downtime Prediction
I am hoping that someone can help me. I am performing some Markov modeling to derive system downtime. I am supposed to derive error bars on my downtime predictions. I want to know how I can derive these error bars. Do they come from sensitivity analysis by varying for example the in service fault detection parameter in my availability model? I am looking at a system which is composed of many susbsystems that each require Markov modeling. How do I calculate the error bars for total system downtime which is the sum of all subsystems? I'm assuming things like fault detection (varying it from 80 to 95%), Switch over success probability etc.