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A Simple Method for Obtaining Resolution IV Designs for Use with Taguchi's Orthogonal Arrays

Summary: A concern expressed in the literature about Genichi Taguchi's methods for experimental design is that many such designs are not optimal in the sense that they are not the maximum resolution possible for a given number of main effects and array size. This paper addresses that concern by demonstrating that Taguchi base-two orthogonal arrays consist of fold-over designs and the two-factor products of fold-overs. The result of recognizing this characteristic is a simple method for guaranteeing resolution IV Taguchi designs. This allows the experimenter to retain the ease of design that using Taguchi's orthogonal arrays affords, and at the same time avoid aliasing main effects with two-factor interactions.

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  • Topics:
  • Keywords: Alias,Taguchi method,Resolution,Foldover designs
  • Author: Bullington, Kimball; Hool, James; Maghsoodloo, Saeed
  • Journal: Journal of Quality Technology