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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Johnson Wood (wuxiangping@huawei.com )
Organization:Huawei Tech.Ltd.,Co.
Date posted: Tue Aug 14 3:55:01 US/Eastern 2001
Subject: Weibull
Message:
The circuit boards burn-in datas are recorded per month, judy as follows: Date Sample Size #Failed 2001-2 1494 34 2001-4 3494 144 2001-5 25902 702 2001-6 20082 682 Which method of Weibull is suitable for this type of data?


Reply:

Subject: Weibull Data
Reply Posted by: Joe Dzekevich (jdzekevich@ieee.org )
Date Posted: Tue Aug 14 16:28:06 US/Eastern 2001
Message:
No method of Weibull is suited for the data. Weibull, like Normal, is a continuous distribution. Your data is discrete, # good, # bad. For a continuous distribution like Weibull, you need a time to failure for each board or run time without failure per board (censored data). What are you trying to find out?


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