Abstract: A method is performed at a system hosting a first dispatching service. The method includes receiving historical information that includes information for a plurality of trips made by a fleet of vehicles. The plurality of trips were dispatched by a second dispatching service, and the information includes an actual time of arrival for each of the plurality of trips. The method also includes, for each trip of the plurality of trips: predicting an estimated time of arrival using services provided by the first dispatching service and computing a difference between the estimated time of arrival and the actual time of arrival for the trip. The method further includes generating a statistical model based on the computed differences, receiving a trip request, and dispatching a vehicle for the trip request using the services provided by the first dispatching service and based at least in part on the statistical model.