As a former stand planner in the various Terminal Controls, T.4/T.1 I can tell you it's a total nighmare of a chess game to play. In the end there are just too many aircraft trying to find a space to park in too small an area. Once a flight goes Tec/late with missing passengers, God the list is endless you might as well throw any pre planning out of the window.
Fun Job, lots of laughs, great people to work with, don't miss the unending pressure. Just how much worse is it for the guys in the Tower they are dealing with lives.