Design of Experiment

Design of experiment (DOE) is used to assess the input factors and interactions that are important to our response. In a series of designed experiments, where the number of experimental runs are optimised, the important factors and interactions are identified. This chapter discusses different types of DOE namely, screening DOE, characterisation DOE, response surface designs, and Taguchi designs. In order to explain some of the DOE terminology, the chapter discusses an example of a Two Level Full Factorial DOE. It illustrates four experiments using low and high levels. It is preferable to have Replicates within a DOE as it allows Minitab to calculate the variability within the experiment. As can be seen from Minitab’s table of available designs the experiment must have at least three factors for a fractional factorial design to be employed. Controlled Vocabulary Terms experimental design; fractional factorial design; Minitab; Taguchi methods