Experiments designed to investigate the effect of several factors on a process have wide application in modern industrial and scientific research. Response surface designs allow the researcher to model the effects of the input variables on the response of the process. Missing observations can make the results of a response surface experiment quite misleading, especially in the case of one-off experiments or high cost experiments. Designs robust to missing observations can attract the user since they are comparatively more reliable. Subset designs are studied for their robustness to missing observations in different experimental regions. The robustness of subset designs is also improved for multiple levels by using the minimax loss criterion. (C) 2009 Elsevier B.V. All rights reserved.
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Univ Montevideo, Dept Ind Management, CITEM, Montevideo 11300, UruguayUniv Montevideo, Dept Ind Management, CITEM, Montevideo 11300, Uruguay
Tanco, Martin
del Castillo, Enrique
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Penn State Univ, Dept Ind & Mfg Engn, University Pk, PA 16802 USAUniv Montevideo, Dept Ind Management, CITEM, Montevideo 11300, Uruguay
del Castillo, Enrique
Viles, Elisabeth
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Univ Navarra, Dept Ind Management, TECNUN, San Sebastian 20018, Gipuzkoa, SpainUniv Montevideo, Dept Ind Management, CITEM, Montevideo 11300, Uruguay