Three skills, one habit of mind. Sequencing tasks is about dependencies — most delays happen because someone started a task before the thing it needed was ready. Reading rosters is about two directions at once: across a row for one person's week, down a column for one day's coverage. Reading timetables is about working backwards from when you must arrive. Pick a view and drag the slider.
A dependency is any task that must finish before another can start — understanding these relationships determines whether you can run tasks in parallel or must schedule them sequentially. The same reading skill runs through all three views: rosters are read in two directions — across a row for one person, down a column for one day — and timetables are read backwards from the time you must arrive, never forwards from when you would like to leave.