Introduction - If you have any usage issues, please Google them yourself
Elevator design a simulation system, which is a discrete simulation program, because the elevator system and elevator passengers and other " physical activities" constitute a collection, although they interact with each other, but their behavior is a fundamental independent. In discrete simulation to simulate the activities of each of the clock decided to move the body and the order of the moment of its occurrence, the system in a simulation of the moment to deal with a variety of things to be done, and then the simulation clock advanced to an action scheduled to take place the next time