help with disallowed combinations for Custom DOE
Hi, I'm trying to design a split-plot experiment (4 hard-to-change (HTC) and 1 easy-to-change (ETC) variable) that involves existing hardware, so I've set the role of the four HTC variables as "discrete numeric" in the design. Each of HTC variables (let's call them A, B, C, D) has three values representing the low, middle, and high levels (let's call the values 1, 2, 3 - but they are numeric, not...