ABSTRACT
The difficulty in planning a lift installation is not in calculating its probable performance, but in estimating the likely passenger demand. Quite often the building has yet to be built and estimates have to be based on the experience gained with previous similar structures. Existing buildings can be surveyed, by observation, or by means of an attached data logger, to determine the current activity. However, even this is prone to error, as the building’s population may have adapted to poor (or good) lift performance.
