Weibull Distribution beta parameter

Posted on 2011-10-03
Last Modified: 2012-05-12
Good Morning,

I have been working on setting up the attached weibull analysis spreadsheet in Excel.  My beta parameter result is 40 from the regression results .  This seems unrealistic, I was wondering if someone could take a look at what is attached and let me know if I have an issue, or if the file contains reasonable results.  Yes, this is the first time I've used Weibull analysis.

Thank you

aasikolo   Weibull.xls
Question by:aasikolo
    LVL 37

    Accepted Solution

    If you want the cumulative distribution, then your numbers are fine. Try changing the TRUEs to FALSEs and see if that gives you what you expected.
    LVL 37

    Expert Comment

    Oh, your column labels are off though. Reliability is not 1-survivability.
    Also, x is usually a time-to-failure, not a percentage.

    Author Comment


    Thanks for the observations.  I didn't think that a beta parameter of 40 was valid.

    As far as the column labels, take a look at this article:

    The percentage thing is a frequency, we're actually trying to find the reliability of a process producing something 70% of the time.

    Your Thoughts?



    Author Closing Comment

    Anything else you can provide would be appreciated - Thanks again.

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