PSDA.9:2 - Problem

A one-point ranking can hide a narrow region of support. Small changes in a value trade-off can reverse it; a common-cause failure can defeat every alternative; a different model can change which conditions are even represented.

Sensitivity work can also miss the decision. A tornado chart may rank output variance rather than choice relevance. One-factor-at-a-time tests can miss interactions. Running thousands of similar scenarios can create an appearance of broad coverage, and their frequency can be mistaken for probability. More calculations do not by themselves support a stronger robustness claim.