What inspired this wish list request? When I create a 2X2X2 factorial design with 2 replicates (16 total runs), and run the reduced model with factor effects A, C, and AC, I expect to get the lack of fit test outcomes because in this case, I have 8 pure error degrees of freedom and remaining 4 degrees of freedom can be used for lack of fit test. But when I really run the model, JMP doesn’t activate the lack of fit report. This is because JMP completely ignores a column B and recognize the model with A, C, and AC as a full model in two factors A and C. But it is truly not a full model in terms of three factors A, B, and C. What is the improvement you would like to see? I suggest let JMP keep the information of factors involved in the data (not the model) and use it to provide a LoF report. Why is this idea important? For example, suppose a user built an initial model with all possible terms in 3 factors factorial design. By investigating the effect summary window, the user can remove some unnecessary terms one by one. Whenever a term is removed, the user may want to confirm the elimination by checking the LoF report. However, currently, if all the terms involving a specific factor are eliminated, LoF is not provided. This is probably not only restricted to 2-level experimental data; the same thing might happen with any general datasets, I think.
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