The general concept is
1) line bidding. The company publishes 100 schedules and 100 pilots bid. #1 gets anything he wants and #100 gets what is left
2) performance(?) based scheduling. 100 people tell a computer what they want and it builds schedules that meet your preferences as much as it can

Companies like #2 because training and vacation mess up #1 and require more reserves to backfill the holes

either system can be heaven or hell… it’s all in the details.

PSA currently has a hybrid heaven-hell system where half the pilot group (through SAP) can pretty much set their schedule every month. Never want to work Christmas? you don’t have to. Meanwhile the bottom half of the seniority list is on reserve so that the company can cover the entire Christmas schedule with 4 lineholders working.

in this context “PBS” means a new scheduling system. There will be winners and losers. Who? How much? Those are the sticky questions that have held it up for years. So who knows what will happen.