One Eighth Fraction
One-eighth fraction will only be applicable for the 6 or more factors screening experiments. Video 11 shows the design process for the one-eighth fraction 26-3 design.
Simply, generate D from the interaction of AB, E from the interaction of AC and F from the interaction of BC. Therefore, the defining relation here is I = ABD = ACE = BCF. The alias structure for the design can be found Table 12.
Table 11. One-Eight Fraction design
Table 12. Alias structure of One-Eight Fraction design