Design of Experiment - Optional Mixture Additives
I'd like to make a custom design to develop a mixture with some optional additives. The basic design is:
Y (Performance)
X1 (Main component physical characteristic): Categorical - 2 level
X2 (Main component chemical characteristic): Categorical - 2 level
X3 (Additive type): Categorical - 2 level (A & B, only one or the other would be used, never in combination)
X4 (Additive concentration): Continuous o...