Screening for fuel economy: A case study of supersaturated designs in practice

Philip R. Scinto, Robert G. Wilkinson, Dennis K.J. Lin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A successful use of supersaturated design and analysis is demonstrated through a case study completed at the Lubrizol Corporation. In the study, a 28-run supersaturated design is used to screen the effects of more than 70 possible model terms (linear effects, quadratic effects, interactions, and measured covariates) on engine motor oil coefficient of friction (COF). Of the over 70 model terms of interest, 50 are two-way linear interactions. A Lubrizol-developed model-averaging technique known as Bayesian variable assessment (BVA) is used to identify the important high-level factors and model terms from the experiment. This study is unique in the literature due to complications in multiple factor levels, physical correlations and constraints on the factors, curvature, and the desire to screen for a large amount of interactions. The test results are subject to common cause variation and unknown special causes such as operator error and test instrument error. Due to time and cost constraints, supersaturated designs are necessary to screen for phenomena such as gasoline-powered engine fuel economy. Based on the results from a 10-run follow-up experiment, the use of the supersaturated design analyzed using BVA is concluded to be a success in this case study.

Original languageEnglish (US)
Pages (from-to)15-25
Number of pages11
JournalQuality Engineering
Volume23
Issue number1
DOIs
StatePublished - Jan 1 2011

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Fuel economy
Screening
Instrument errors
Engines
Gasoline
Experiments
Friction
Costs
Industry

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Industrial and Manufacturing Engineering

Cite this

Scinto, Philip R. ; Wilkinson, Robert G. ; Lin, Dennis K.J. / Screening for fuel economy : A case study of supersaturated designs in practice. In: Quality Engineering. 2011 ; Vol. 23, No. 1. pp. 15-25.
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Screening for fuel economy : A case study of supersaturated designs in practice. / Scinto, Philip R.; Wilkinson, Robert G.; Lin, Dennis K.J.

In: Quality Engineering, Vol. 23, No. 1, 01.01.2011, p. 15-25.

Research output: Contribution to journalArticle

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