MINIMUM-ABERRATION 2-LEVEL SPLIT-PLOT DESIGNS

The treatment-design portion of fractionated two-level split-plot desi gns is associated with a subset of the 2(n-k) fractional factorial des igns. The concept of aberration is then extended to these split-plot d esigns to compare designs. Two methods are presented for constructing two-level minimum-aberration split-plot designs, along with examples. An extensive catalog of such designs is tabulated. Extensions to prime -level designs and relations to inner-outer arrays are also presented.