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Robinson 2007 Part b (Identify Model Inputs (Sources (From Modeling…

- - - - Iterations
      - Repetitions
- - - - Overall Aims of the Org
        Ask Org "What do you hope?"
        
        Achivement
        
        Increase throughput?
        
        Reduce Cost?
        
        Improve Customer Service?
        
        Improve Understanding of the system?
        
        Measures of
        Performance
        
        Increase throughput by **10%**
        
        Reduce cost by $10,000?
        
        Constraints
        
        Budget?
        
        Design Option?
        
        Available Space?
      - Modeler's
        Role
        
        Educating Clients
        Simulation's potential
        
        Suggest Changes to
        Objectives
        
        Add
        
        Redefine
        
        Eliminate
    - - Flexibility
      - Run-speed
      - Visual Display
      - Ease-of-use
      - Model/Component reuse
      - Time-scale
- - - - Time Series
      - Gantt Chart
      - Bar / Pie
- - - - Changes to
        Rules
      - Model Structure
- - - - Entities
        
        Parts in a factory
        
        Customers in a service operation
        
        Tel Calls in a call centre
        
        Information in a BP
        
        Forklift truck in a warehouse
      - Activities
        
        Machines
        
        Service Desks
        
        Computers
      - Queues
        
        Conveyor systems
        
        Buffers
        
        Waiting Areas
        
        in / out-trays
        
        Computer Storage
      - Resources
        
        Staff
        
        Equipments
    - - Criteria
        
        Credibility
        
        Utility
        
        Feasibility
        
        Validity
      - Presentation
        Recording
        
        Methods
        
        Table Recording
        
        Columns
        
        Component
        
        Justification
        
        Include / Exclude
        Decision
        
        Diagram
        
        Prototyping
        
        Importance
        
        Validation
        
        re-use
        
        Generating Alternatives
        Compare
    - - Meetings
        Modelers, Clients, Domain Experts
      - No. of iterations
        between 3 steps
      - Recording
  - - - Methods
        
        Aggregating
        Model Components
        
        Replacing Components
        with Random Variables
        
        Excluding
        Infrequent Events
    - - Discussions on
        Each Component
        
        Modeler
        
        Client
        
        Domain Experts
      - Assess
        
        Include / Exclude
        Details
        
        Validity
        
        Credibility
        
        Utility
        
        Feasibility
        
        Assumptions / Simplifications
        
        How to model
        Details
        
        Impact of
        Assessment / Simplifications
      - Sources
        
        Judgement
        Modeler / Client / Domain Experts
        
        Modeler's Past Experience
        
        Data Analysis
        Preliminary Data About the system
        
        Prototyping & Testing
      - Recording
        Table
        
        Component
        
        Detail
        
        Include / Exclude
        
        Justification
  - - - Contextual Data
        
        To Understand the problem
        
        As an aid to form CM
        
        Ex: Layout Diagram
        Preliminary Data on Service Time
      - Data for
        Model Realization
        Level of Detail table
      - Validation Data
        Past Performance Statistics
    - - Sensitivity Analysis
      - Sampling
      - Accuracy
    - - Change the
        Design of CM
      - Change
        Modeling Objectives
      - Making Assumptions
        & Recording
- - - - Use a
        Problem Structuring Method
        
        Soft System Methodology
        
        Cognitive Mapping
        
        Causal loop diagram
    - - Rarely Exists
- - - - Client's Opinion
      - Client's past experience
      - Client's experience with the current project
      - Interaction with modeler
      - Client's good understanding with CM
    - - Available Time
      - Available Skills
      - Available Data
      - Available
        Hardware / Software
    - - Key Relationships
      - Accuracy
      - All input from client
      - Key Components