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DOE (Minitab) - Analyse Factorial Design with Higher Order Terms

Discussion in 'DOE - Design of Experiments' started by Wayne_Y, Apr 6, 2021.

  1. Wayne_Y

    Wayne_Y New Member

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    Hi there,

    I am currently trying to use Minitab DOE to analyse some factors in terms of their significance and main effects. When I tried using the analyse factorial design function, I can choose the order of the terms I want and whether I want to include any interactions into the analysis.

    By having different order terms included in the analysis - the result in terms of the identified significant factors are different. Factor B was deemed insignificant when using only the single-order terms (see image below for reference).

    Can anyone please help to advise as to why this happens? Thank you.

    Image 1 - Higher Order Terms (2nd Order Interactions) Included
    upload_2021-4-6_2-30-54.png

    Image 2 - Only 1st Order Terms (Main Terms) Included
    upload_2021-4-6_2-31-30.png
     

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