A compute is assigned by mapping a literal 'compute' to the eval attribute of a parameter, and mapping the source of the parameter to the required value, and the parameter itself to the required value.
Procedure
Select the activity (that you want to define parameters for) in the process flow.
In the
Properties Window, go to the
Input to Activity tab.
Expand the
activityname input parameters on the right.
Select the parameter that you want to provide a value to and drag it onto DataField on the left.
Double-click on the parameter and select
Compute from the
Eval drop-down list.
