Chapter 17. Design of Experiments (DOE)
Designed experiments play an important role in quality improvement. This Chapter will introduce the basic concepts involved and it will contrast the statistically designed experiment with the "one factor at a time" (OFAT) approach that has been used traditionally. Also briefly discussed are the concepts involved in Taguchi methods, statistical methods named after their creator, Dr. Genichi Taguchi.
The traditional approach vs. statistically designed experiments
The traditional approach, which most of us learned in high school science class, is to hold all factors constant except one. When this approach is used we can be sure that the variation is due to a cause and effect relationship or so we are told. ...
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