WORKSTUDY-A_SANTA ANA PD - STRATEGIC PATROL STAFFING PLAN - FINAL REPORT

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SAPD patrol, then the concurrent validity of the MAPP is demonstrated. In other words, there is concurrent validity if the number of patrol officers needed in SAPD according to the base MAPP is the same as the number of patrol officers assigned to SAPD at the time of the analysis. Concurrent validity is a complex and objective means of determining the validity of the MAPP. As demonstrated in the next section, the research team was successful in building a valid base MAPP and establishing the concurrent validity of the MAPP as it applies to SAPD. Establishing concurrent validity verifies the accuracy of the MAPP and its ability to be used to accurately determine SAPD patrol staffing needs in the future. BUILDING THE BASE MODEL: MAPP VARIABLES The initial objective in the modeling process was to build a base MAPP for each patrol district which reflects the current conditions of patrol in SAPD. A total of 30 variables were used in the development of the base MAPP for SAPD. In this section, each of the variables is discussed along with the data assessed to arrive at their values. Calls for Service and Service Time Variables The main concept behind the MAPP is to account for all activities performed by SAPD patrol officers and the amount of time it takes to perform these activities. In order to accomplish this, it is necessary to assess calls for service in the City of Santa Ana. The data assessed for calls for service include dispatched calls only since data on self-initiated and administrative activities are accounted for in a separate part of the MAPP. The call for service data were provided to the research team by SAPD personnel and include all calls for service, by priority level and patrol district, for calendar year 2013. The MAPP input values for calls for service are illustrated in Table 2. Table 2 Base MAPP Input Values for Annual Number of Calls for Service by Priority Level by Patrol District District 1 District 2 District 3 District 4 MAPP Variable Westend Northeast Southeast Southcoast Annual Number of Priority 1 CFS 502 544 489 645 Annual Number of Priority 2 CFS 4,293 4,283 4,014 5,108 Annual Number of Priority 3 CFS 13,558 13,993 14,221 16,323 Total 18,353 18,820 18,724 22,076 Service time is calculated based on the elapsed time from when an officer is en route to the scene to when the officer clears the call. It includes the time spent on each call by the primary unit assigned the call as well as all back-up unit responses as well. The average service time for calls for service data were provided to the research team by SAPD personnel and include the average А