PBS is ultra efficient.
No month to month, training, or vacation conflicts.
It will also schedule around any other event like FMLA, Mil Leave, Office Days, ALPA work, etc.
It will at a min change you staffing requirements by 10%. (given were we all are now with staffing)
That said, it also works well for almost all the pilots on a list. If the trips are built well, it does a decent job of assigning your Line of Time (LOT)
I agree that the ALV (Average Line Value) target can be moved up or down up to 10 hrs to deal with over staffing or understaffing issues. That is the same as original line awards. The difference with PBS is it tries to work around your parameters.
With some of the functions that PBS does, it is possible for a junior guy to get most of the requests they want in a non-holiday month. It will pick a trip off a senior pilot and assign it to the junior pilot unless the senior pilot has specifically asked for the trip.
If you do not have it, it will be a huge savings to the company if you allow it. Get a lot in return for it because it saves a boat load of money.