What is the fundamental flaw in Info-Gaps generic robustness model?
Answer-16: The fundamental flaw in Info-Gap’s robustness model is that it makes a mockery of Info-Gap’s declared aim: the tackling of severe uncertainty. That is, in stark contradiction to this declared aim, Info-Gap’s robustness model in effect ignores the severity of the uncertainty altogether. This fact is vividly brought out by the following bizarre Invariance Property of Info-Gap’s robustness model. Specifically, the robustness of a decision, say d, is completely invariant with the size of the complete region of uncertainty U, so long as U contains the region U(α’,û) where α’> α(d,û). To illustrate, suppose that for some decision d we find that α(d,û) = 1000 and that U contains the region U(1001, û). Then this implies that the robustness of d will remain equal to 1000 regardless of U increasing in size.
