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Optimisation run results are compared to the Pareto Front. The Pareto Front is simply the set of solutions which have differing performance on each of the objectives. A solution is not on the Pareto Front if there is an alternative that is better on at-least one of the objectives but no worse on any objectives. In this case the solution is discarded as the alternative is clearly preferable. If the Pareto Front solutions are not changing, the optimiser may have satisfactorily completed its multi-objective search.
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- Choose the type of plot (scattered or pareto) in the Plot Option drop-down menu;
- In the Selected Filter drop-down menu, choose the filter and click Edit Filter;
- This opens the Edit Filter dialog (shown in Figure 4) showing the entire range of values.
- You can change the filter's name using the Filter Title panel.
- Edit any value by double clicking on the cell you wish to change and enter the required value (in the Lower Filter or Upper Filter columns); and
- Click OK to save changes close the Edit Filter dialog or Cancel to quit without saving.
Figure 3. Insight results, 2D graph
Figure 4. Insight results, Filter properties
3D graph
Click the 3D Graph tab to view a three-dimensional plot of the computed optimised solutions (shown in Figure 5). Just as with the two-dimensional graph, the individual solutions form a Pareto Front. The x, y and z-axes represent the objectives that were specified in the project. These can be changed using their individual corresponding drop down menus in the Configure panel on the left. Click Plot to re-arrange the plot. Click Reset to revert it back to its original state, and Save to save the results of the 3D graph to a file.
Additionally, you can filter the graph view to a specified range using the Filter Properties dialog (as shown in Figure 4) under the Plot Option drop-down menu.
Figure 5. Insight results, 3D graph
Spider graph
The third tab in the Results dialog shows the optimised results in a spider graph (as shown in Figure 6). You can use the Filter feature (as described previously) to view a filtered spider graph of the results.
Figure 6. Insight results, spider graph
Table
The final tab in the Results dialog shows all the results of the optimisation in a table. Figure 7 shows an example of the table, with all optimised solutions for each objective and decision variable specified in Insight. Note that the green arrow on the right allows you to save the decision variable to the Source project.