ABSTRACT
This chapter evaluates equation for round trip time in order to calculate the performance of a lift system. The equation depends on three data sets concerning the building, the lift system and the passengers. The round trip equation comprised six parameters: three parameters were time independent variables and three parameters were time dependant variables. It is these six parameters that must be evaluated in order to determine the round trip time equation. The value of the rated speed is usually supplied by the lift maker, who will select it to meet traffic purposes. The parameter ts involves evaluation of flight and door times. The floor flight time tf is the time taken from the instant the car doors close to the instant the car is level with the next adjacent floor. Statistical theory has been used to derive two of the parameters of the round trip time equation S and H.
