Mixture design - specifying linear constraints
I wanted to have mixture design or custom design with 5 raw materials (P1, P2, X, Y, Z). And in this design, sum of two of the same type of raw materials P1 & P2 should be between 0.2 and 0.4. I tried to use linear constraints. But JMP is saying that the constraints are wrong. What will be the right constraint for that? and is this possible to do? And is it possible to include the combined effec...