iSixSigma

JDG

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  • #178050

    JDG
    Participant

    Good points although I wasn’t intending to blame Six Sigma. I concur that your point about using Six Sigma proactively, including as a collaborative tool, vs reactively is probably a significant factor.
    I’m more curious about whether any of those involved — whomever wrote the spec, checked the spec, confered with Mfg Eng to validate the spec, signed it as a representative of their functional department prior to release, updated the Planning for implementation, installed the fasteners with a curious gap remaining under the head, or provided QA support during First Article buyoff — realized the potential problem before it subsequently effected thousands of fasteners. Maybe somebody did speak up but got the response they’d received in previous experiences attempting to do so. Would be interesting to hear from someone actually involved.

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    #67264

    JDG
    Participant

    Stability above all means predictability. In other words, based on today’s data, can I predict what the process will do tomorrow, and with what degee of confidence? Each and every process (and characteristic within that process) needs to be considered individually. Questions need to be asked such as, “What’s the shape of the distribution?”, “How critical is this characteristic?”, “Am I more concerned about small process shifts, or large ones?, “Is there any serial correlation of the data?”, and others. Such questions should be asked and answered buy a cross-functional team working under the guidance of someone who understands why it’s important to ask these questions.

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    #67268

    JDG
    Participant

    I’ve enjoyed following this discussion train (see previous posting). What disturbs me is all the “fighting for position” that seems to be going on. I think the questions that have been raised here are much more important than the answers. I hope we keep asking those questions. I remember someone saying that the scientific method is the quest to prove yourself wrong. If we keep asking questions we’ll all get closer to Deming’s state of “profound knowledge. If we stop, we’ll never get there.

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Viewing 3 posts - 1 through 3 (of 3 total)