Statistical Analysis of Modern Elevator Dispatch Hall Car Response Times

Hall call response times of elevator dispatch systems have been statistically modelled by the Poisson process. This distribution has proved rather accurate when evaluating relay based dispatch algorithms. In the analysis of modern microprocessor based elevator dispatch algorithms, such as the Dynamic Sectoring Algorithm, the CGC Algorithm, or the Minimal Variance Algorithm it is clear that the statistical performance can no longer be modelled by the Poisson Process. This paper investigates other distributions that better describe the elevator dispatch system behaviour as well as provides a hypothesis of why the Exponential Poisson Process provided a good fit in the past.