Design & Factor Selection
Design Types & Categories
Error Runs - Error runs may repeat one or more experimental conditions, usually for the purpose of estimating experimental error. During analysis all runs contribute to the degrees of freedom available for estimating the parameters; surplus runs become part of the error estimate.
Learn more about the DOE tools for designed experiments in Six Sigma Demystified (2011, McGraw-Hill) by Paul Keller, in his online Intro. to DOE short course (only $99) or online Advanced Topics in DOE short course (only $139), or his online Black Belt certification training course ($875).