Sensitivity Analysis

D-Sight provides a set of sensitivity analysis tools. The stability intervals (illustrated on the left) allow to see at a glance in which ranges the weights of the different criteria could move without affecting the best solution.

The stability intervals have multiple benefits when analysing a solution:

1. Large intervals provide more confidence in the solution as it represents a more robust solution. On the contrary small intervals highlight that the decision maker could take a second look at the solution and dig deeper in the results.
2. When multiple stakeholders are involved to set the weights of the different criteria, stability intervals provide a way to reassure them that different sets of weights could link to the same solution.

The walking weights are another great sensitivity analysis tool in D-Sight. The decision maker can modify the weights of the different criteria and see how the results would change in real time. This allows to assess immediately the impact of a change of weight on the ranking of the alternatives or in the visual analysis for instance.

Since all results are updated in real time, the walking weights offer a good support for discussion when the weights are somewhat flexible. In addition, when multiple stakeholders are involved, this tool provides them a way to interact easily.

The GAIA brain can be seen as the next step of the walking weights. It allows to visualize the incertainty on the criteria weights and how the solution would move depending on this uncertainty. The decision maker can therefore specify a range in which the weights of the different criteria would be included. D-Sight will then automatically calculate how the decision axis would move.