Journal Article

A Class of Three-Level Designs for Definitive Screening in the Presence of Second-Order Effects

Jones, Bradley, Nachtsheim, Christopher J.

2011

Overview

Screening designs are attractive for assessing the relative impact of a large number of factors on a response of interest. Experimenters often prefer quantitative factors with three levels over two-level factors because having three levels allows for some assessment of curvature in the factor-response relationship. Yet, the most familiar screening designs limit each factor to only two levels. We propose a new class of designs that have three levels, provide estimates of main effects that are unbiased by any second-order effect, require only one more than twice as many runs as there are factors, and avoid confounding of any pair of second-order effects. Moreover, for designs having six factors or more, our designs allow for the efficient estimation of the full quadratic model in any three factors. In this respect, our designs may render follow-up experiments unnecessary in many situations, thereby increasing the efficiency of the entire experimentation process. We also provide an algorithm for design construction.

• Publisher: Taylor & Francis,American Society for Quality,Taylor & Francis Ltd
• Subject: Algorithms / Alias / Assessments / Confounding / Coordinate Exchange Algorithm / Curvature / D-Efficiency / Design / Design factors / Effects / Efficiency / Exact sciences and technology / Experimental design / Experimentation / Experiments / Mathematical analysis / Mathematical models / Mathematics / Probability and statistics / Response Surface Designs / Robust Designs / Sciences and techniques of general use / Screening / Screening Designs / Sparsity / Statistics / Studies