I see how to use the FDE when I have a DOE with a functional response and want to determine how to set my DOE x's to minimize the difference in the response function to a target function (desirability function tools used).
How can this be extended so that two separate response functions can be modeled and used to select the optimum DOE settings to minimize the difference in both functional responses relative to each of their targets?
I would prefer an interactive explanation.
Example from JMP sample data



