Fig. 8. Scatter diagram showing the distribution of cases in two dimensions, with the distance between the case positions representing the degree of difference of the cases. The cases are coded as: A, Scenario A (no intervention); B, Scenario B (intermediate intervention); and C, Scenario C (large intervention; see Fig. 5); with numbers from 0 to 20 indicating the start (Year 0) to 20 years. Also shown are the four variables used to produce the diagram, with the variable positions indicating the cases (those near that position) that have generally high values of the variable. The variable values were derived from a Stella simulation model.