Modeling and Multivariate Methods - SAS

Chapter 24 Visualizing, Optimizing, and Simulating Response Surfaces 587
Mixture Profiler
Figure 24.36 Initial Output Window for Five Factor Mixture
A few items to note about the output in Figure 24.36.
• All the factors appear at the top of the window. The mixture factors have low and high limits, which
were entered previously as a Column Property. See Using JMP for more information about entering
column properties. Alternatively, you can enter the low and high limits directly by entering them in the
Lo Limit and Hi Limit boxes.
• Certain regions of the plot are shaded in gray to account for the factor limits.
• The on-axis factors, x1, x2 and x3, have radio buttons selected.
• The categorical factor, Type, has a radio button, but it cannot be assigned to the plot. The current value
for Type is L1, which is listed immediately to the right of the Current X box. The Current X box for
Type uses a 0 to represent L1.
• All three prediction equations have contours on the plot and are differentiated by color.
A manufacturer desires to hold Y1 less than 1, hold Y2 greater than 8 and hold Y3 between 4 and 5, with a
target of 4.5. Furthermore, the low and high limits on the factors need to be respected. The Mixture Profiler
can help you investigate the response surface and find optimal factor settings.
Start by entering the response constraints into the Lo Limit and Hi Limit boxes, as shown in Figure 24.37.
Colored shading appears on the plot and designates unfeasible regions. The feasible region remains white
(unshaded). Use the Response slider controls to position the contours in the feasible region.