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  • @SSWarsi I’m not an expert in Taguchi but I believe that there are not modifications to a 3-factor, 3-level L9 design to specifically allow for interactions. However, the base design would allow you to analyze the AB interaction (keeping in mind it is highly correlated with C) and you don’t need to set up a column ahead of time. Just create the…[Read more]

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  • I don’t know Minitab but I’m guessing that when you tell Minitab to generate the interactions it takes the design matrix, multiplies the columns together to compute v12 v13 v14 v23 v24 and v34 interaction terms and then tries to plug these into the model. If I try this in SAS most of the interactions cannot be estimated because they are linear…[Read more]

  • I don’t know Minitab but I’m guessing that when you tell Minitab to generate the interactions it takes the design matrix, multiplies the columns together to compute v12 v13 v14 v23 v24 and v34 interaction terms and then tries to plug these into the model. If I try this in SAS most of the interactions cannot be estimated because they are linear…[Read more]

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  • Hi There

    I am sorry if the question I have seems a bit childish. I am PhD Student and need some help in Taguchi Methods. I am using Minitab software for the DOE process. I have 3 factors all at three levels. As described in the interaction table of L9, if a factor A is assigned to Col:1 and Factor B is assigned to Column 2 then A X B…[Read more]

  • Hi There

    I am sorry if the question I have seems a bit childish. I am PhD Student and need some help in Taguchi Methods. I am using Minitab software for the DOE process. I have 3 factors all at three levels. As described in the interaction table of L9, if a factor A is assigned to Col:1 and Factor B is assigned to Column 2 then A X B interaction…[Read more]

  • Hi There

    I am sorry if the question I have seems a bit childish. I am PhD Student and need some help in Taguchi Methods. I am using Minitab software for the DOE process. I have 3 factors all at three levels. As described in the interaction table of L9, if a factor A is assigned to Col:1 and Factor B is assigned to Column 2 then A X B interaction…[Read more]

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