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dcurb
March 9th, 2008, 01:13 PM
I have been assigned the task of creating general guidelines for introduciong new tools/equipment into a production environment. The vendors have done Developmental Verification and a successful Pilot run must be completed before they can be used company wide. My question is--- If I know R, C, b(weibull slope), MTTR, and sample size
a) is there a formula or methodology I can use to determine the proper Amount of cycles or run time that is needed to reach my desired reliability and confidence levels.
or
b)is there more information needed to determine this and if so, what is it

Unfortunately, I am not a reliability engineer and the last few weeks of research have given me a better understanding of what is needed, but I have reached a roadblock thx

dcurb
March 9th, 2008, 01:42 PM
sorry I put MTTR in the post meant MTBF

Pantelis
March 10th, 2008, 08:14 AM
One approach is to use reliability demosntartion techniques.
See http://www.weibull.com/LifeDataWeb/test_design.htm#demonstration
for methododlogy.

Use the Weibull approach using your indicated inputs.