SRC Forum - Message Replies
Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and Answers
Topic Posted by: Reliability & Maintainability Forum
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Posted by: Johnson Wood
Date posted: Tue Aug 14 3:55:01 US/Eastern 2001
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?
Subject: Weibull Data
Reply Posted by: Joe Dzekevich
Date Posted: Tue Aug 14 16:28:06 US/Eastern 2001
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?