How should experimental day be treated in a Custom Design: fixed block or random block?
I am planning to create a DOE using Custom Design with 5 factors and 40 experimental runs.
Due to operational constraints, I can conduct up to 20 runs per day, so the experiment will be executed over 2 days.
In this situation, how should the experimental day be treated in the design and analysis?
Should the experimental day be modeled as a fixed block or a random block?My assumption is that there i...