Publications and Preprints
Small Asymmetric Fractional Factorial Plans for Main Effects and Specified Two-factor Interactions
by
Ashish Das, Aloke Dey and Paramita Saha
Fractional factorial plans represented by orthogonal arrays of strength two are known to be optimal in a very
strong sense under a model that includes the mean and all the main effects, when all interactions are assumed to
be absent. When a fractional factorial plan given by an orthogonal array of strength two is not saturated, one
might think of entertaining some two-factor interactions also in the model. In such a situation, it is of interest
to examine which of the two-factor interactions can be estimated via a plan represented by an orthogonal array,
as also to study the overall efficiency of the plan when some interactions are in the model along with the mean
and all main effects. In this paper, an attempt has been made to examine these issues by considering some
practically useful plans for asymmetric (mixed level) factorials with small number of runs.
isid/ms/2003/14 [fulltext]
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