A simple and universal method of decision making within the scope of criteria of "cost and efficiency"

A new concept of chances of decision optimality is introduced to the ontology of multi-criteria decision making. Its fruitfulness is illustrated by a practically significant task of comparing the alternatives within the scope of criteria of “cost and efficiency” in which this concept makes it possible to get complex quantitative evaluation of decision quality without any compulsory input of additional information from a decision-maker., except some indeterminate judgments as “better” or “more important”, if desired. In addition to it, the author shows that the only incessant evaluation function that makes it possible to determine all Pareto-optimal decisions in any range of multi-criteria alternatives is the minimax folding of Yu.B. Germeyer. The chance of decision optimality is determined by the measure of the variety of values of indefinite coefficients in this folding when the evaluation function gets the best value within one solution than within any other solutions of the given range of alternatives. A simple calculation algorithm and a visual geometric method of evaluating optimality chances have been worked out.