Ranking alternatives

With ranking is meant; displaying the alternatives in such way that decision makers can judge the effects of each and choose between them. In coastal zones, several disciplines are usually involved in a project and each have their own criteria to judge alternative solutions by. The analyst must therefore cope with multiple (sometimes conflicting) criteria when ranking the alternatives. Two large groups of methods can be distinguished:

  • aggregated methods, where the scores of alternatives on the various criteria are lumped and a final ranking of alternatives is obtained, and
  • disaggregated methods, where the result per criterion per alternative is presented in a tabular form.

Though aggregate methods can be useful for initial quick analysis and for groups with similar interest to choose a preferred solution. Due to their limitations, in public sector problems the disaggregated methods are preferred.