Brief History
      Brief History
  Model Use and Applicability
      Best Use
      Model Use and Applicability
  Model Weaknesses
      Model Weaknesses
  Plot Configuration
      Plot Configuration
  Strategic Emphasis
      Strategic Emphasis
  Subsequent adaptations/variations
      Subsequent adaptations/variations
  Summary
      Summary
  The Approach
      The Approach
  Tips and Traps
      Tips and Traps
  Welcome
      Welcome