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Process Simulation to Improve Custody Throughput

Hampshire Constabulary uses process simulation to improve custody throughput in their newly combined custody suite, analyzing the impact of volume on business processes and staffing levels.

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Process Simulation to Improve Custody Throughput

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  1. Process Simulation to Improve Custody Throughput Alan Jackson Hampshire Constabulary

  2. Overview: • Hampshire Constabulary have employed Business Process Management, together with appropriate tools, as an essential part of their continuance improvement ethos since 2002. • iGrafx Process Improvement Solutions are an essential part of process management within the Constabulary

  3. Custody Process Simulation Task In support of plans to combine three older custody suites into one large purpose built suite analysis support was required to review the following areas prior to GO LIVE; • Demonstrate impact of combined custody volumes from 3 sites • Create simulation model to demonstrate impact of these custody volumes on business processes and staffing levels

  4. Challenges: • Mixture of electronic and manual data. • Manual data sometimes inaccurate • Utilising the data set from 3 different sites • Ensuring correct mix of data set – no bail returns • Tight Timescales

  5. Simulation Model: • Custody Data for simulation model based on November 09. • Daily resource availability capped at 85% (allowing for Meal breaks, Housekeeping etc.) • No provision made for Abstractions and Annual Leave • 2 Custody operations were simulated:- Simulation 1:- 3,1,3 Ratio - 3 Custody Sergeants (2 booking in, 1out) - 1 CCTV / Security operator - 3 CDO’s (1 dedicated floor walker, 2 booking in / out ) Simulation 2 :- 4,1,4 Ratio • 4 Sergeants (3 in 1 out) - 1 CDO (CCTV etc) - 4 CDO’s (dedicated floor walker and 3 alternating).

  6. Simulation Results: Average Custody arrivals in November = 2 per hour Simulation 1 :- Staffing Profile : 3,1,3 (3 Custody Sergeants, 1 CCTV, 3 CDO’s) Results from simulation :- - 10 hrs 44 mins = Average time spent in custody - Custody Desk unable to keep pace with intake and despatch (increasing pressure on limited holding area) - Prolonged periods of time with excessive queues Simulation 2:- Staffing Profile : 4,1,4 (4 Custody Sergeants, 1 CCTV, 4 CDO’s) Results from simulation :- - Average time spent in custody reduced to 10hrs 04 mins - More consistent flow (from intake to despatch). Comment: Custody Processes require reviewing / streamlining (in line with pace) with a view to reducing the time spent in detention

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