Supervisory control for elevator group by using fuzzy expert system which addresses the riding time

There are two algorithms in the conventional elevator group control system: the minimum long-wait algorithm and the area-based control algorithm. These algorithms are designed to reduce service time (waiting time+riding time) by decreasing waiting time. This article proposes a new elevator group control system which addresses riding time as well as waiting time. It is difficult to tell the user's destination floor at the point of elevator car assignment. The authors decided, therefore, to design the algorithm in a way not to increase the user's riding time in order to reduce service time and improve the overall services to users.