Quantification of the task performance of a uniformed police patrol officer: A group process approach

This paper describes the development of a police task performance index (PTPI). This measure, a quantitative indicator of task performance, consists primarily of a ratio of weighted tasks performed to weighted tasks required for a particular situation. Quantification of the index was based on the consensus of an expert panel of police officers. Consensus was obtained through the use of both the Delphi technique and a modified nominal group process.The PTPI was developed for the special case of those police tasks performed by a uniformed patrolman at the scene of a medical emergency. Four categories of medical emergencies were examined—medical emergency only, crime scene with injuries, traffic accident with injuries, and a situation with injuries involving a threat to public safety (e.g. a fire). Application of the index is illustrated in two case examples.