Plackett Burman designs with full factorials

Several types of designs are available, and the choice of design depends on the number of variables and how detailed the information has to be. A full factorial design is a good choice when the number of variables is four or less. When more than four variables are of interest, a fractional design is applicable. With a large number of variables, a Plackett-Burman design (PBD) [164, 165] is the preferred choice. 

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