Investigation of an Elevator Call Strategy

This paper attempts to describe the simulation of the lift call strategy used by a passenger lift within a university building. The purpose of this study is to devise and develop strategies to enhance the current lift operations by reducing the average waiting time of passengers. A base model was developed to mimic the actual lift system and different approaches were carried out to meet the project aims. The simulation was done by using WITNESS software. The lift is in high demand during the interchange of classes and also at lunch time. It was observed that the lift experienced heavier traffic in the time between 9:00AM and 1:00PM of the day. Passenger's traffic data was collected manually in that period. After analysing the data, four new lift call strategies were devised. All of the strategies were simulated and results were compared to base model. Among the strategies, the strategy that incorporated the car to wait at the unloaded floor appeared to produce the best results as it reduced the average waiting time by 4.4%.