You may want to investigate variables that are process-related, rather than geometric in nature. For example, you may want to vary the pouring temperature or time, or perhaps the preheat temperature of an investment casting shell or permanent mold die. This is done using the Model Data Design Tab. A sample screen is shown below:
When you check one of the boxes, an upper and lower limit are shown for that variable, and you can adjust them. An example might be to vary the pouring time between 15 and 25 seconds for a casting, or to vary the pouring temperature up and down to see how casting quality is affected.