This setting will show the man-hours in parallel to the loading, under the Loading chart tab. The man-hours will be calculated and the values will be presented under the List tab. Any staffing factor exceptions for the operations are considered when calculating man-hours.
If the work center has staffing factor < 1 and you select to Show man-hours, the unit time is recalculated according to the staffing factor, but any setup time will not be affected. This also applies if you have selected the alternatives Show man-hours in the Loading Selection procedure and Calculate man-hours in the Orders / Work Center procedure. If the work center has staffing factor >= 1, the calculation is based on the total time (setup time + unit time).
If you select to Show man-hours, the capacity will be greyed out in this list since the capacity may have another calculation basis than the loading (when the staffing factor is < 1). However, the loading will always be calculated based on the total time.