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Viewing 8 posts - 1 through 8 (of 8 total)
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  • #40502

    Todd O.
    Member

    I have two different suppliers supplying components to two different facilities, using two different sets of tooling and checking fixtures. What would be the best method to verify accuracy of parts between the two suppliers? I’m familiar with R&R’s to some extent, but wanted to know if there is a specific tool for this specific issue.
    Thanks,
    Todd

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    #125917

    HF Chris
    Participant

    What requirements have you given to the suppliers for the component? Are they installed the same way on the next higher assembly. I worked Fighter aircraft in the military when we received new fuel shutoff valve from another vendor (suitable sub). Part worked like the specs required but it did not fit. It was GD’s vault because that parameter was not accounted for.
    Chris

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    #125918

    HF Chris
    Participant

    I forgot to ask about mission reliability, are you measuring that as well?
    Chris

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    #125979

    Taylor
    Member

    Chris,
    Thanks for the response. The suppliers each have individual part prints for the many components they’ll be stamping. After stamping the components, they weld them into an “identical” complex assembly. Both the components and assembly are measured by prints. The assemblies each need to be “identical” because they are being shipped to final assembly plants and used in a product being assembled in two different locations.
    The possibility exists that one supplier may need to provide back-up for the other should a tool go down due to damage.
    Reliability requirements are HIGH.
    Your thoughts are appreciated.
    Todd
     

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    #125980

    “Ken”
    Participant

    Todd,Just a few thoughts.. If you measure critical dimensions of the same assemblies from different suppliers what about assessing the capability of each supplier to the requirements?Ken

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    #125986

    Peppe
    Participant

    Multivendors that ship to different facilities is a standard, today. If all facilities are under your responsability, set an aligned measurement system, so that you can use it as reference for all suppliers, after that a standard analysis process will give you the right answers (anova etc..). At least 2 different suppliers are the same of 2 different production lines, but having very clear which are the basicly differencies between them (toolin/checking). An alignement between MSAs, your and suppliers, is strongly reccomanded, in multivendors arena.
    Rgs, Peppe 

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    #126681

    fsutculer
    Participant

    Anyway the measurement  system(s) should be verify through R&R or isoplot studies.
    Then we come to the familiar stage as called capability.
    Simply, comparing standard deviations would give the result.
    Normally you aim to have same standard deviation for each process.(ideally)
    If this is not the case, you have to make some analysis to reduce the higher one.
    Regards
     

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    #126757

    Dalziel
    Participant

    Assuming that your part specifications have correctly identified the true “critical” parameters, then a tolerance stack-up of the individual components will tell you if you could have a problem interchanging parts.
     
    (I’m assuming that as you have stamped parts, you’ll have good within sub-group capability, but potentially larger variation between sub-groups (run to run)
     
    If you actually have a concern with the assemblies in use, then (in my opinion) the best approach is to use the Shanin(?) Component Search tool, to establish which part from which supplier is causing the issue.
     
    Hope that helps,
    Dalziel

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