Split-plot designs for multistage experimentation

Murat Kulahci, John Tyssedal

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Most of today’s complex systems and processes involve several stages through which input or the raw material has to go before the final product is obtained. Also in many cases factors at different stages interact. Therefore, a holistic approach for experimentation that considers all stages at the same time will be more efficient. However, there have been only a few attempts in the literature to provide an adequate and easy-to-use approach for this problem. In this paper, we present a novel methodology for constructing two-level split-plot and multistage experiments. The methodology is based on the Kronecker product representation of orthogonal designs and can be used for any number of stages, for various numbers of subplots and for different number of subplots for each stage. The procedure is demonstrated on both regular and nonregular designs and provides the maximum number of factors that can be accommodated in each stage. Furthermore, split-plot designs for multistage experiments with good projective properties are also provided.
Original languageEnglish
JournalJournal of Applied Statistics
Volume44
Issue number3
Pages (from-to)493-510
ISSN0266-4763
DOIs
Publication statusPublished - 2016

Keywords

  • Kronecker product
  • Mirror image pairs
  • Projectivity
  • Restrictions on randomization
  • Two-level designs

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