Go to: Models tab>select model under Model Name>Parameters>Edit>Range
Range constraints are an option available when you apply Basic Rules to your model. With Range constraints, you can assign a range of values for each parameter. Later, you can modify each parameter and the increment value. For general information on constraints, see parameter constraints.
Range constraints allow you to do the following:
Enter a minimum value (Min Value).
Enter a maximum value (Max Value).
Specify the increment value (Step By).
If you assign a Range
constraint to a parameter, that parameter cannot have a relationship with
another
parameter
when using Hierarchical
Rules.
You cannot use constraints with Design Table Rules (see Using Rules).
To assign a range of values:
If necessary, use Search, Advanced search, or select a model from the Model Name list to display the appropriate model.
Click Parameters.
The selected part dialog box is displayed, listing the External Parameter and Internal Parameter.
Click Edit for the parameter to which you want to assign a range.
The Edit [model name] Parameter: dialog box, identified by the Internal Parameter, is displayed.
Under Select Constraint Type, select Range.
Type the minimum Min Value, and the maximum Max Value values.
Under Step By, type the increment value for this parameter.
Click Save.
General information: