
236 CHAPTER 8 Design of experiments: a key to innovation in nanotechnology
8.3.2 TWO-LEVEL FACTORIAL DESIGN
8.3.2.1 Two-level full factorial design
Like the factorial design, the two-level factorial design requires all possible combina-
tions to be executed. However, instead of using several levels of each factor, only two
levels are selected. This design is helpful when used in the beginning of an experi-
mental effort in order to select only the potential signicant factors, especially if the
experimenter has limited knowledge of the experiment.
8.3.2.2 Two-level fractional factorial design
If there are k factors of interest and the two-lev