This feature is available only in Simul8 2016 and later.
When Overtime is enabled you can analyse Simul8 object results by the following time periods;
Normal Time - this will show the results during simulation time you have defined in clock settings.
Overtime - this will show only the results during overtime.
Both - this will show the combined results of both Normal Time and Overtime.
To view these results, run the simulation and select a simulation object. There is a dropdown menu at the bottom where you can select a result period to view, by default Normal Time is selected.
You can add these results to the Results Summary as normal by right clicking the result. Normal Time results will appear as usual, Overtime and Both results will appear with the result name and the time period in brackets e.g. Working % (Overtime).