Introduction - If you have any usage issues, please Google them yourself
Consider a very busy small airport, the airport has only one runway. In each unit of time, only one aircraft can be landed, or only one aircraft can take off, but not at the same time landing and take-off. Aircraft landing and take-off random, so any given moment, the aircraft and the runway may be idle, or may have an aircraft is landing or taking off, and may have a number of aircraft waiting for takeoff or landing. Procedures for the preparation of a simulation of this situation.