Recent Developments in the Design of Factorial Experiments

Since 1965 almost all of the contributions to the design and analysis of factorial experiments have involved fractional factorial plans. These contributions may be categorized by three main classes of plans which are: (a) fractions of asymmetrical factorial arrangements, (b) irregular fraction plans and (c) sequences of fractional factorial plans. In this article the development of the design of factorial experiments since 1965 will be outlined. Some of the plans described have not as yet appeared in the statistical literature.