Add a function

1. On the Model toolbar, click the tool or, on the Model menu, choose Functions.

2. In the Define Functions dialog box, click the Add button.

3. In the Add New Function dialog box, type a function name and select the function type.

• Use No Argument for distribution functions.

• Use Argument for mapping functions.

Define a distribution function

1. On the Model menu, choose Functions.

2. In the Define Functions dialog box, select an existing function name.
   
   The function must be previously declared to be a distribution function as explained in the Add a function row above.

3. Specify the number of intervals, and enter a range and value for each interval.

4. Select the Continuous check box to specify a continuous function if desired.
   
   The continuous function option is only available if the function return type is Value.

Define a mapping function

1. On the Model menu, choose Functions.

2. In the Define Functions dialog box, select an existing function name.
   
   The function must be previously declared to be a mapping function.

3. If the argument type is a number, specify the number of intervals.

4. For each interval, type a range and value.

5. Select the Continuous check box to specify a continuous function if desired.
   
   The continuous function option is only available if the function return type is Value.

6. If the argument is a type, specify a value for each type member, then click OK.