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    Berk21's Avatar
    Berk21 Posts: 5, Reputation: 1
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    #1

    Jan 26, 2009, 06:11 PM
    Figuring out a failure rate
    I have been working on a spread sheet on quality control for telecommunican technicians.
    I am stumped on one or two things. I am trying to get a % of failure according to the work that has successfully completed according to what was QC'd and what failed. Is there such a way? Or formula? And would it be fair to evaluate them on such a equation?

    Example:
    Joe completes 25 jobs successfully. Quality control evaluates 32% of that work. Joe fails 5 of that 32%.. What can I base his failure % on?


    I have attached the spread sheet to help in the matter... The column I need help with is P (QC failure % by Tech)

    I have a feeling I can't do it based on the information provided.

    Thanks in advanced
    Berk21's Avatar
    Berk21 Posts: 5, Reputation: 1
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    #2

    Jan 26, 2009, 06:12 PM
    Sorry I forgot the attachment
    Berk21's Avatar
    Berk21 Posts: 5, Reputation: 1
    New Member
    		  
    #3

    Jan 26, 2009, 06:17 PM
    Quote Originally Posted by Berk21 View Post
    I have been working on a spread sheet on quality control for telecommunican technicians.
    I am stumped on one or two things. I am trying to get a % of failure according to the work that has successfully completed according to what was QC'd and what failed. Is there such a way? or formula? And would it be fair to evaluate them on such a equation?

    Example:
    Joe completes 25 jobs successfully. Quality control evaluates 32% of that work. Joe fails 5 of that 32%..What can I base his failure % on??


    I have attached the spread sheet to help in the matter...The column I need help with is P (QC failure % by Tech)

    I have a feeling I can't do it based on the information provided.

    Thanks in advanced
    Having problems uploading excel file.
    sveegaard's Avatar
    sveegaard Posts: 13, Reputation: 3
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    #4

    Feb 21, 2010, 08:08 AM

    Do you mean:

    1) Joe completes 25 jobs successfully.
    2) QC evaluates 8 of the jobs
    3) Joe fails in 5 of the 8 jobs
    ?

    Because then I would look at things such as mean and variance to judge if this sample of 8 has 5 failures by chance or if Joe generally fails over half of his jobs.
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