Hi,
I am completing a DOE and I have ran a fit model using the JMP software to define a design space based on desirability of certain variables, however one of the desirability variables is a simple ratio of two of the construct model effects, however when running the model, the model is defining its own prediction expression for this variable rather than using the formula in the data table. Does anyone have any advice on how to replace the prediction expression for a variable with one defined by the user? Any help would be greatly appreciated.
