Hello,
I am trying to to design a DOE with the following factors:
X1 -1 +1
X2 -1 +1
X3 -1 +1
X4 L1 L2 L3
Due to experimental logistics, X4 cannot be changed easily; it requires an entire day to change. The other factors can be changed easily during each experiment. I was thinking of just doing a full factorial DOE design with X1, X2, and X3; and then repeating that same design for each level of X4. However, this seems overly simplistic and I think it is not the correct way. I am at a lost.
How can I proceed in the DOE design and have a more elegant way to capture this? I do prefer that within each level of X4, all combinations of X1, X2, X3 are included, as those variable are easy to change and it doesn't eat up time/resources. Thank you.
