Modeling and Multivariate Methods - SAS

596 Visualizing, Optimizing, and Simulating Response Surfaces Chapter 24
The Simulator
Using Specification Limits
The profilers support specification limits on the responses, providing a number of features
• In the Profiler, if you don’t have the Response Limits property set up in the input data table to provide
desirability coordinates, JMP looks for a Spec Limits property and constructs desirability functions
appropriate to those Spec Limits.
• If you use the Simulator to output simulation tables, JMP copies Spec Limits to the output data tables,
making accounting for defect rates and capability indices easy.
• Adding Spec Limits enables a feature called the Defect Profiler.
In the following example, we assume that the following Spec Limits have been specified.
Table 24.3 Spec Limits for Tiretread.jmp data table
Response LSL USL
Abrasion 110
Modulus 2000
Elong 350 550
Hardness 66 74
To set these limits in the data table, highlight a column and select Cols > Column Info. Then, click the
Column Properties button and select the Spec Limits property.
If you are already in the Simulator in a profiler, another way to enter them is to use the Spec Limits
command in the Simulator pop-up menu.
Figure 24.45 Spec Limits
After entering the spec limits, they are incorporated into the profilers. Click the Save button if you want
the spec limits saved back to the data table as a column property.
With these specification limits, and the distributions shown in Figure 24.42, click the Simulate button.
Notice the spec limit lines in the output histograms.