INCIDENT MANAGEMENT: PROCESS ANALYSIS AND IMPROVEMENT

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INCIDENT MANAGEMENTPROCESS ANALYSIS AND
IMPROVEMENT

• Randolph Hall
• Heng Liu
• University of Southern California

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PROJECT OBJECTIVES

• Part 1
• --- Document Incident Processes
• --- Identify Data Sources
• Part 2
• --- Evaluate Individual Incidents
• --- Model Impact of Processes on Incidents

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DISPATCHING ISSUES

• Dispatcher Awareness of Unit Locations
• Determination of Unit Type to Dispatch
• Positioning of Resources to Best Respond to
  Incidents

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LITERATURE

• Large Literature on Spatial Queueing Networks
• Focus Primarilly on Police Patrols and Fire
  Response
• Impact Measured in Response Time, and Percentiles
  of Distribution
• Little on Effects of Dispatching Policies on
  Network Performance

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TYPES OF DISPATCH UNITS

• Stationary Units (From a Base)
• Fire
• Emergency Medical
• Tow Operator
• Mobile Units (In the Field)
• Highway Patrol
• Freeway Service Patrol

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Mobile Unit Dispatching

• Beat Boundaries
• Units per Beat
• Dispatching Across Beat Boundries
• Awareness of Precise Unit Location When
  Dispatched
• Prioritization of Calls

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Importance of Knowing Patrol Car Location
Patrol Car
Beat Area
Incident
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Incident Management Simulator

• Incident Simulator
• Dispatch Simulator
• Traffic Flow Simulator

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Incident Simulator

• Class Replicates CAD Data
• Incident Classification (e.g., CHP code)
• Location(Highway/Milepost/Direction)
• Time
• Profile Replicates Details
• Number of Vehicles, Lanes
• Detection Time, Clearance Time
• Required Response Units

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Profiles vs. Class

• Each Class has Associated Profile Probabilities
• Classes
• Profiles

Increasing Magnitude ?
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Dispatching Simulator

• Input
• Alternative Mobile Strategies
• Alternative Base Unit Strategies
• Status Monitor
• Locations of Units
• Whether Units are Busy
• Queue Processor
• Assigns Incidents to Units, Based on Strategy

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Traffic Simulator

• Aggregate Level Modeling of Local Queues
• Input Based on Arrivals to Highway Segments, from
  Loop Data
• Time Evolution Modeled During Different Phases of
  Incident Detection, Response, Verification,
  Clearance
• Log File Created to Record Incidents

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Simulation Environment

• Windows Based
• Dialogue Boxes Used to Import Data, Set
  Paramenters, and Set Run Characteristics
• Output Documents Individual Incidents and Overall
  Incident Performance