We have no system per se.

The 15 day flex will not be known until the evening prior to working.

The 18 day fixed will be published on the 15th of the month prior. I think we are supposed to contact someone to send it to us. Not really sure, since we have 2 more weeks until we see the first version of this schedule.

The 7/7 schedule awards are posted on a company website that you can see at home. Your current month shows up on the same website when you log in.

The soon-to-be-no-more 18 day with H days was not published, but you could call the company to see what was planned for you. Although this was subject to change. Your H-days were awarded some time before the current month began, so you knew those days were off.