pain points
Building the schedule is the easy part. Keeping it accurate through the week is where the time goes.
Your manager builds next week's schedule on Friday and by Monday morning someone has called out, someone needs to swap, and a new shift has opened. The rest of the week is spent patching by text, email, and "can anyone cover" messages. The schedule that gets published isn't the schedule that runs, and most managers estimate five to ten hours a week goes to scheduling maintenance alone.