ABSTRACT
The difficulty in planning a lift installation is not in calculating its probable performance, but in estimating the likely passenger demand. There are two key factors, quantity of service and quality of service, affecting the demand that a building's occupants will make on a lift system. This chapter indicates methods to facilitate the design task by looking at building populations, the likely demand on the lift installation and the quality of service factor. It also indicates the factors, which need to be considered when estimating the building population. The average passenger waiting time is calculated by adding all the individual waiting times together and dividing by their number. The primary consideration of passenger average waiting time (AWT) can be combined with the secondary consideration of passenger average travel time (ATT) to give a passenger average journey time (AJT). The chapter presents improved traffic design procedures, the iterative balance method, and its visualisation by the HARint plane.
