Saving runs in fractional factorial designs
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When it is known a priori that some contrasts are negligible in a factorial design, their expressions can be used to deduce the missing results. In this article we propose a method for using this procedure when, as in the case of fractional designs, it is not known which contrasts will be null. The method is based on first establishing an interval of possible values corresponding to each of the missing results, then identifying which contrasts are always null independently of the value of said results.
CitationGrima, P., Rodero, L., Tort-Martorell, J. Saving runs in fractional factorial designs. "Quality engineering", 27 Desembre 2018.
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