Mixed resolution designs as alternatives to Taguchi inner/outer array designs for robust design problems

There has been considerable debate over the contributions made by Genichi T aguchi to robust process and product design. As a result of the numerous de bates, there have been many alternative approaches presented that are bette r suited to the robust design problem. In this paper a combined array desig n is presented as an alternative to a standard Taguchi design. The mixed re solution design is illustrated in an example involving control and noise va riables. Two new variance properties of experimental designs are also prese nted. Copyright (C) 2000 John Wiley & Sons, Ltd.