Christopher J. Nachtsheim

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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(More)
Recently, Jones and Nachtsheim (2011) proposed a new class of designs called definitive screening designs (DSDs). These designs have three levels, provide estimates of main e↵ects that are unbiased by any second-order e↵ect, require only one more than twice as many runs as there are factors, and avoid confounding of any pair of second-order e↵ects. For(More)