3.5 Tunnel problem

3.5.1 Statement of Problem
 3.5.2 Problem Analysis
  3.5.2.1 Preception
  3.5.2.2 Strategy
  3.5.2.3 Conception
  3.5.2.4 Summary
 3.5.3 Model identification
  3.5.3.1 Modelling
  3.5.3.2 Representation
  3.5.3.3 Analysis
  3.5.3.4 Summary
 3.5.4 Implementation
  3.5.4.1 Solution
  3.5.4.2 Interpretation
  3.5.4.3 Validation
  3.5.4.4 Summary
 3.5.5 Criticism of model
 3.5.6 Revised model, experiments