
389Chapter sixteen: Improve
• Full factorial: Full factorial represents the experimental design in which all
combinations of all levels of factors are considered. No combination factor is omit-
ted. An example of a two-level, three-factor full factorial design is shown as follows:
A B C
− − −
− − +
− + −
− + +
+ − −
+ − +
+ + −
+ + +
• Input factor: Input factor is an independent variable that may affect the response of
the dependent output variable.
• Inner array: The factors can be controlled in a process called an inner array. It is fol-
lowed in Taguchi fractional factorial design.
• Interaction: An interaction in the experiment occurs when the effe ...