Comparing Designs for One-Step Response Surface Methodology

• Activity Number: 128
• Type: Contributed
• Date/Time: Monday, August 1, 2011 : 8:30 AM to 10:20 AM
• Sponsor: Section on Physical and Engineering Sciences
• Author(s): David Edwards*+
• Companies: Virginia Commonwealth University
• Keywords: factor sparsity ; minimal aliasing design ; one-step RSM ; orthogonal array ; screening

Abstract

The sequential design approach to response surface exploration is often viewed as advantageous as it provides the opportunity to learn from each successive experiment with the ultimate goal of determining optimum operating conditions for the system or process under study. Recent literature has explored factor screening and response surface optimization using only one three-level design to handle situations where conducting multiple experiments is prohibitive. The most straightforward and accessible analysis strategy for such designs is to first perform a main-effects only analysis to screen important factors before projecting the design onto these factors to conduct response surface exploration. This article proposes the use of optimal designs with minimal aliasing (MA designs) and demonstrates that they are more effective at screening important factors than the existing designs recommended for single-design response surface exploration. For comparison purposes, we construct 27-run MA designs with up to 13 factors and demonstrate their utility using established design criterion and a simulation study.