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An Approach to Developing Multi-Level Fractional Factorial Designs

Summary: (This paper was presented at the Journal of Quality Technology Session at the 41st Annual Fall Technical Conference of the Chemical and Process Industries Division and Statistics Division of the American Society for Quality and the Section on Physical & Engineering Sciences of the American Statistical Association in Baltimore, Maryland, October 16-17, 1997.)Two-level factorial designed experiments are popular in industry due to their simplicity, efficiency, eqase of interpretation, and flexibility in sequential experimentation. However, experimenters are often frustrated by a few factors that require more than two test conditions among many that do not, forcing the use of unnecessarily complex designs, or compromising the experimental objectives. This paper discusses some straightforward extensions to the two-level factorial approach which allow a "mostly" two-level design with some three or four level exceptions with no loss of orthogonality or design resolution.

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  • Topics: Design of Experiments
  • Keywords: Resolution,Fractional factorial design,Design of experiments (DOE)
  • Author: Bingham, Thomas C.
  • Journal: Journal of Quality Technology