Editing Elevator paradox (section)

== The real-world case ==

In a real building, there are complicated factors such as: the tendency of elevators to be frequently required on the ground or first floor, and to return there when idle; lopsided demand where everyone wants to go down at the end of the day; people on the lower floors being more willing to take the stairs; or the way full elevators ignore external floor-level calls.  These factors tend to shift the frequency of observed arrivals, but do not eliminate the paradox entirely.  In particular, a user very near the top floor will perceive the paradox even more strongly, as elevators are infrequently present or required above their floor.