Convergence Plot Analysis
The Convergence Plots dialog gives other perspectives during optimisation.
To open the Convergence Plots dialog, click 
on either the Violation tab or Cut-fill tab of the Optimisation Panel.
Convergence Plots on the Optimisation Toolbar to open the dialog.Feasibility. Be sure the feasibility line is tracking downwards. If it levels off before reaching zero, the desired constraints and objectives cannot be met 100%. Review problem areas in the Violation View, and reassess your plans.
The optimisation status at the top of the chart indicates the probable solution status as a colour-coded message above the chart.
- Green. Trending towards an optimal solution. This shows the optimisation will likely be successful.
- Orange. More iterations need to determine a solution. This prompts that more time is needed to determine if the solution is viable.
- Red. Review needed. This indicates that there are too many conflicts for a reasonable optimisation and requires that the global and object constraints be adjusted. The grading object locations may need to be modified as well depending on the project.
The feasibility line in the chart also displays these colours as it processes.
Volumes. Limiting earthwork is a project objective. This chart helps you to identify any fill that needs to be brought in, or cut that needs to be removed from the site. This chart identifies both and tracks a net volume. The net volume target is zero by default, but it can be specified in the Optimisation Options dialog. Under the Objective Weights section, specify the Cut-Fill field for the Balance Cut and Fill option.
Terrain Smoothness. This chart tracks the optimisation attempts to minimise the gradient change between adjacent triangles on the surface.
Observing the optimisation in the Convergence Plot allows you to see when fewer changes to the surface elevations are occurring. In these cases, it may make sense to stop the optimisation instead of waiting for only a slightly better result.