Split-Plot Designs

Selecting a Design

This example uses a split-plot design. This notation indicates the following:

• two whole-plot factors, each with two levels
• full factorial in whole-plot factors
• four split-plot factors, each with two levels
• full factorial in split-plot factors

This is equivalent to the notation used by Bingham and Sitter (2001). The second part of the exponent refers to the degree of fractionation. The 0's indicate that this is a full factorial design in both the whole-plot and split-plot factors.

To select this design, click Select Design in the main design window. The Split-Plot Design Specifications window will appear. Select the row in the list.

Close the Split-Plot Design Specification window and click Yes to generate the design. The design has 64 runs, the same as a factorial design.

Close the design you just created. Open the Tablet Formulation Split-Plot design, which is identical to the design you just created and contains response values.