Example of the Simulator

Tip: The Make Table and Sequencing options are most useful when you have random values. Sequencing options are available for the following distributions only: Normal, Uniform, and Triangular.

Specify the number of runs in the simulation by entering it in the N Runs box.

After the factor and response distributions are set, click the Simulate button to run the simulation. Or, use the Make Table button to create a table with N Runs for the number of rows. Each row is populated with a random draw from the specified distributions, and the corresponding response values are computed. If spec limits are given, the table also contains a column specifying whether a row is in or out of spec.

Use sequencing to examine how the distribution of the response changes when the mean (sequencing location) and variability (sequencing spread) of the inputs change.

Select Help > Sample Data Library and open Tiretread.jmp.

Select Graph > Profiler.

Select Pred Formula ABRASION and Pred Formula MODULUS and click Y, Prediction Formula.

Click OK.

From the red triangle menu next to Prediction Profiler, select Simulator.

Change each factor to be Random instead of Fixed.

Change the N Runs value to 100.

Open Simulate to Table then Sequencing.

Simulator Settings

You want to examine how the responses change when the mean values change.

For SILICA, select Sequence Location. Keep the number of steps at 5. Because the mean is 1.25, change the values over a range of 1 (lower) to 2 (upper).

10.

For SILANE, select Sequence Location. Keep the number of steps at 5. Because the mean is 50, change the values over a range of 40 (lower) to 60 (upper).

11.

For SULFUR, select Sequence Location. Keep the number of steps at 5. Because the mean is 2.25, change the values over a range of 2 (lower) to 3 (upper).

Sequencing Settings

12.

Click Make Table.

You can see that the SILICA Mean, SILANE Mean, and SULFUR Mean columns contain five steps for each range of values (Silica Mean is 1, 1.25, 1.5, 1.75, and 2; Silane Mean is 40, 42.5, 45, 47.5, and 60; and so on.) Pred Formula ABRASION and Pred Formula MODULUS values are calculated for each combination of values, so you can see how the responses change as the factor values change.

13.

Select Analyze > Distribution.

14.

Select Pred Formula ABRASION and SILICA Mean and click Y, Columns.

15.

Click OK.

Distribution of SILICA Mean by Pred Formula ABRASION

Click a histogram bar that corresponds to a SILICA mean to see how the prediction formula for ABRASION changes given the selected mean.