Optimal distribution policy for mobile police patrols

Abstract

The operations of the mobile resources of Durham County Constabulary have been studied with particular reference to their function of responding to calls for service, both emergency and otherwise. Data collected during two three-month survey periods a year apart has been analysed to determine the main quantitative aspects of mobile police performance and to evaluate the demand for and the service provided by these resources. The effects of organisational changes made between the two survey periods have been assessed in terms of these measures of performance. Significant changes in some aspects of the service provided were recorded. Mathematical models of these measures of police performance have been tested and found to be generally applicable to the Durham Constabulary situation. They have been used to explain some of the observed changes and to form a basis for the evaluation of various policies for allocating mobile resources to optimise performance. Various possible objectives for mobile police resource allocation have been considered and their consequences on allocation and on patrol car organisation evaluated. A conflict between certain allocation objectives under Durham Constabulary conditions has been indicated. An allocation of mobile resources to satisfy specified service capabilities in areas of mixed urban/rural characteristics has been recommended and its implications considered.