In practice, input data entering a state problem are almost always uncertain to some extent. Thus it is natural to consider a set ${𝒰}_{\mathrm{a}d}$ of admissible input data instead of a fixed and unique input. The worst scenario method takes into account all states generated by ${𝒰}_{\mathrm{a}d}$ and maximizes a functional criterion reflecting a particular feature of the state solution, as local stress, displacement, or temperature, for instance. An increase in the criterion value indicates a deterioration in the featured quantity....