A2.18 It is important to examine how robust the results are to changes in the weights and scores used. This can be done with the aid of sensitivity analysis. For example, the weighted scores can be recalculated to demonstrate the effect upon them of changing the weights. Similarly, they can be recalculated to show the impact of different scores.
A3.19 Judgement should be used to select suitable variations in assumptions to subject to sensitivity analysis. For example, where there have been differences in opinion within the group about certain weights or scores, it will be helpful to explore the impact of using the different weights or scores advocated by different group members.
A3.20 Details of the sensitivity analysis should be recorded, and the robustness of the results confirmed. Where appropriate, attention should be drawn to circumstances in which the ranking of options, or the differences in weighted scores, are particularly sensitive to plausible changes in certain weights or scores.