Greetings JMP Community,
This should be a good place to start:
"Note: The estimates are demanding in their need for a lot of well-designed, well-fitting data. You need more data to fit variances than you do means."
Thank you Phil.
I expect that the runs needed for even a small number of factors will not be trivial due to the requirement for replicates. I will take advantage of the link provided to put together some trial designs.