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1.5 sigma shift

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  • October 8, 2008 at 6:16 pm #51092

    Bob Grant
    ★ 10 Years ★
    Participant

    I am new to the Six Sigma and i was looking over some of the things posted on the web and was wondering can a process be in control because it can drift 1.5 sigma from the mean and not produce a defect
    with a CP=2 and a Cpk =1.5

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    October 8, 2008 at 6:24 pm #176561

    GB
    ★ 10 Years ★
    Participant

    Bob,
    Peruse the blue bar to the left and click on, ‘New To Six Sigma?”.   Your journey will begin there.

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    October 9, 2008 at 9:44 am #176575

    Craig
    ★ 10 Years ★
    Participant

    The best way to understand this is by dropping the letter F from shift. Read what it says a few times, and be enlightened.

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    October 9, 2008 at 10:17 am #176577

    Clive
    ★ 10 Years ★
    Participant

    There is no link between if a process is in control and if it’s producing defects. This is a common error which lots of people make, control is just about variation in the process not about how that links to customer specifications.
    A process can be in perfect control in that it produces the same thing everytime but everything it produces is defective and the reverse can be true as well.

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