Full Factorial vs. Face Centered Response Surface Matrix
I have to factors and am trying to model a response. I only have 12 allowable runs and blocks are not an option here. I'm trying to figure which is the best approach here to optimize, assess curvature behavior and get the most out of the data. Here is my design: The resulting DoE (full factorial, 1 replicate, 3 center points) seems good but under Fit Model, it says I'm not to estimate quadratic te...