Analysis focuses on research relative to major hypotheses concerning preventive patrol, the police emergency response system, and other organizational and manpower allocation schemes. Methodological and substantive findings of research in these areas are then considered to determine the degree to which each major hypothesis is substantiated or refuted and the credibility of the evidence. Overall, studies suggest that preventive patrol cannot be definitively linked to crime deterrence, although foot patrol appears to increase citizen satisfaction. Reduced response time appears to result in greater apprehension of suspects and increased citizen satisfaction, and some alternative schemes (one-man patrols, split-force schemes, and demand management) may be more efficient than routine patrol. Research on the interface between patrol and investigative functions also is reviewed and the utility of team policing approaches is related to these functions. Finally, the role of newer technologies in the area of police field service is evaluated. Technologies examined include computer-aided dispatch, automatic vehicle location, emergency telephone systems, resource allocation software, and mobile digital communication systems. Section notes and references.