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Topic Taguchi Signal/Noise Ratio in Minitab

Taguchi Signal/Noise Ratio in Minitab

Home Forums General Forums Methodology Taguchi Signal/Noise Ratio in Minitab

This topic contains 1 reply, has 2 voices, and was last updated by  Joe DeSimone 2 weeks, 6 days ago.

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  • #706557 Reply

    Hi, There,

    I got two question that bothered me for a while, Particularly regarding the discrepancy in Nominal-is-Best SN calculation between software and textbook:
    There are 3 types of formula to calculate Nominal-is-Best SN:

    1. Minitab does not include the Type I formula: SN=-10log[(ybar-m)^2+S^2], which should make more sense, and it appears in all Taguchi textbooks. What is the potential cons for this algorithm? Is there any good reason why Minitab does not use it as default?

    2. Regarding the Type II Nominal-is-Best SN, Minitab provides a so-called “Use adjust formula for Nominal is the Best”, SN=10log10[(Ybar^2-S^2/n)/S^2], What is the working mechanism behind this adjusted formula , which is not seen in the Taguchi text book?

    #706592 Reply

    Joe DeSimone

    Dr. Joe DeSimone

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