iSixSigma

Terry Krueger

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  • #70728

    Terry Krueger
    Member

    Tim,
    I agree with you – especially on the 1.5 Sigma shift concept. If you look at the definition of Six Sigma as standard deviations from the spec limit, then there should not be a negative sigma, but it should be noted that the standard deviations are on the wrong side of the spec limit. Mathematically this is represented by a negative – although it really wouldn’t be negative. So it is mathematically possible, but not realistic. Do you agree?

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    #69984

    Terry Krueger
    Member

    Two things
    Squaring a number eliminates negatives
    Squaring also produces a nonlinear curve (like chi-square)
    e.g.
    2>4
    4>16
    16>256
    and therefore visibility increases exponentially.

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Viewing 2 posts - 1 through 2 (of 2 total)