Mixture Design Types | JMP 12

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Design of Experiments Guide • Mixture Designs • Mixture Design Types

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Mixture Design Types

To create a mixture design, choose DOE > Mixture Design, enter the responses and factors into the initial mixture designer panel, and click Continue. You then see the Linear Constraints report and the Choose Mixture Design Type panel. Both are shown in Mixture Design Selection Dialog.

Three design types support linear constraints: Optimal, Extreme Vertices, and Space Filling. If you have linear constraints and plan to use the Extreme Vertices or Space Filling Design Types, click the Linear Constraint button and enter these first. If you plan to use the Optimal Design Type, click Optimal and add the constraints under Define Factor Constraints in the dialog window that opens.

Select one of the design types from the panel. The default values shown for K, Number of Levels, Degree, and Runs depend on the number of factors entered. The design types are:

invokes the custom designer with all the mixture variables already defined.

Simplex Centroid

lets you specify the degree to which the factor combinations are made.

Simplex Lattice

lets you specify how many levels you want on each edge of the grid.

Extreme Vertices

lets you specify linear constraints or restrict the upper and lower bounds to be within the 0 to 1 range.

generates a screening design for mixtures devised by Snee (1975).

constructs a design that accommodates linear constraints. Design points are spread throughout the design space.

Mixture Design Selection Dialog

After you select the design type, enter selections or accept defaults to adjust the number of runs in the Design Generation panel. Then click Make Design or Make Table, as appropriate.

The following sections describe each mixture design type and show examples.