Plot Mixture Design

Factorial Plots - Cube Plot

Cube plots can be used to show the relationship between process variables and a response. Each cube can show three process variables. If there are only two process variables, Minitab displays a square plot. Minitab draws as many cubes as necessary to show up to seven process variables.

Note	You can create a cube plot with or without a response measure. Viewing the process variables without the response allows you to see what a design "looks like."

Example Output

$image\mixpcb1n.gif$

Interpretation

For the fondue data, only one square is needed to represent the two process variables. The square plot illustrates the following:

· If serving temperature is 80° and the serving time is 0.5 hours, the flavor is 56.4444.

· If serving temperature is 90° and the serving time is 0.5 hours, the flavor is 65.4444.

· If serving temperature is 80° and the serving time is 1 hour, the flavor is 59.8889.

· If serving temperature is 90° and the serving time is 1 hour, the flavor is 66.5556.