On the Simulation tab, you can estimate the length of time it takes for the selected step to be completed, and the percent of the time each route would be taken.
To specify simulation properties
It is possible to specify that a resource performs at more or less than 100% efficiency. For example, if the specified step duration is 20 minutes, but the resource that processes that step performs at 50% efficiency, then the simulation would show the actual duration of the step as 40 minutes.
NOTE Duration does not apply to Submap steps because the Process Engine executes the map that these steps reference.
If the workflow definition is designed so that occasionally there are no true routes (the work item terminates), you can simulate that by making the total of the route weights less than 100%. For example, if the total of the route weights is 90%, this work item will terminate and the workflow will not run to completion in 10% of the cases.