iSixSigma

Gauge RR

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  • #50916

    The Hooded Claw
    Member

    I am conducting a Gauge R&R using 4 operators however I do not know what the K value would be for 4 operators using the X-Bar method
    Anyone know of where I could find this value?????.
    Before you ask I am not allowed to use Minitab, daft I know!!!
    Cheers

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    #175652

    NICOLAE
    Participant

    The K2 value for 4 operators is 6/2.24=2.678I found this value in the book Gauge R&R Studies – For Destructive and Non-Destructive Testing by Mario Perez-Wilson.
    You can also find it in Quality Control and Industrial Statistics by Acheson Duncan.

    Good luck

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    #175668

    walden
    Participant

    It depends if you’re using 5.15 or 6 standard deviations for your calculations. For 5.15 the K2 value is 2.30. For 6 the value is 2.68 like Nicole stated.

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    #175685

    walden
    Participant

    I hurried my original post because I was trying to get out of here for lunch. After giving it more thought, I should have asked you for the values of at least one of the other K1 or K2 values you’re using before I answered.
    The values depend on how the factors you are using were calculated (i.e. 5.15/2.24, 6/2.24 or 1/2.24 for 4 appraisers). You’ll notice the difference in the K1, K2 and K3 factors used between the 2nd and 3rd editions of the AIAG MSA manuals.
     

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    #175688

    Ken Feldman
    Participant

    Well, I’m sorry. If lunch is more important posting an accurate response on this Forum then we don’t want to hear from you. You are hereby banned for 28.376 hours or until you correct your deviant behavior. All would have been forgiven if you said that you were sloppy because you were in a hurry to get to a bar and drink heavily. But alas, you didn’t, so the clock starts now.

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    #175705

    Craig
    Participant

    Are you sure you aren’t doing a take-home exam or something? It sounds crazy that you are not allowed to use Minitab.
    My suggestions:
    Use the ANOVA method, Use Minitab or JMP, use 3 operators

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    #175710

    Mikel
    Member

    Can you use an Excel spreadsheet set up for the ANOVA method?

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    #175728

    ANDREA
    Participant

    Yes, I can use them. Can you upload them please?

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    #175729

    Mikel
    Member

    Send me an email at [email protected]

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    #175736

    Craig
    Participant

    I would make sure the pretty charts are included with the excel template. (The interaction plot and XBar / R plots are  pretty useful). The Hooded Claw might want to use the excel template using ANOVA, unless he or she was actually doing a take home exam.

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    #175841

    The Hooded Claw
    Member

    Thanks for you help.
    The reason i cannot use minitab or excel to do this is because neither of these have been validated at my company.
     

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    #176153

    Nandakumar
    Participant

    You may find this link to contain useful information that I recently went through while I was stuck with the same question:
    http://elsmar.com/Forums/showthread.php?t=16530&page=2

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