Custom design factor constraintsGood morning,
I create a DOE containing 2 answers (A and 
and 2 factors (C and D). The two factors are concentrations of, say, 5 to 9 for C and 10 to 25 for D. I would like to create a plan with constraints on the factors, the fact that the D/C ratio must be equal to or greater than 4. How should I realize this. Additionally, what types of factors should I encode? continuous or discrete? I am a little lost.
Design of Experiments
