Constrained Split-Plot Designs

Abstract

It often happens that all the experimental runs within one group have the same level for one or more factors under investigation. Typically, these factors are hard to change or to control. The resulting design is then called a split-plot design. The groups of a split-plot design are referred to as whole plots and they are divided in so-called sub-plots. The hard-to-change factors are usually called whole plot factors, while the remaining factors are called sub-plot factors.