In 1973 The New York City-RAND Institute developed a simulation model of police patrol activities for the New York City Police Department (R-1625/2). In order to demonstrate to the Department that the simulation was an accurate description of its field operations, and could be used for analyzing policy decisions, a validation experiment was conducted. Field observations were made to gather data on actual event sequences which were then compared with simulation event sequences. Details of the experiment and a discussion of the results are presented. (Prepared for delivery at the 8th Annual Symposium on Simulation held in Tampa, Florida on March 12, 1975.)
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