Input and Output Files

SPD3.FOR

The program SPD3.FOR computes the best possible split-plot designs when no restrictions are imposed on the number of whole plots or on the whole plot sizes. Nevertheless, the program has an option to specify an upper bound for the number of whole plots. The search for the optimal design is over a finite grid of candidate points, which must be specified in the input. The default set of candidate points assumes a hypercubic design region and uses the points of a full factorial design as the set of candidate points. The appendix to Chapter 8 contains an outline of the design construction algorithm. The following files can be used as an input to the program.

input25.prn

This input file can be used to generate D-optimal designs for the steel experiment described in Section 8.2.1. Note that one of the experimental factors is qualitative and that the default grid of candidate points can therefore not be used. It is specified that no more than six whole plots can be used. The optimal design for this problem is displayed in Table 8.2.

output25.prn

input26.prn

This input file is intended for the computation of a D-optimal design with 10 observation for the estimation of a full quadratic model in one whole plot factor and two sub-plots factors. The D-optimal split-plot designs are given in Equation 8.1.

output26.prn

input27.prn

This input file is intended for the computation of a D-optimal design with 10 observations for the estimation of a full quadratic model in one whole plot factor and two sub-plots factors. In contrast with the previous input file, the number of whole plots is now restricted to three. The D-optimal designs for this problem are given in Figure 8.2.

output27.prn