You can set priority for a process definition. By default, a process definition is given a medium priority of 8. However, its priority can be changed to an integer greater than or equal to 0.
To set the process definition priority:
Click the empty space in the Process Definition editor to display the Properties view for the process definition.
Select the General tab in the Properties view.
Enter the priority value in the Priority field. This will set the priority for the process definition.
