Measurement of Differences in Preferences Expressed by a Simple Additive Rule

The Method of Weighted Sinn of Criteria Estimates (WSCE) is popular in multicriteria decision making. The question arises, how to measure differences in the preferences of different decision makers or the same decision maker (DM) over time when using the WSCE method. A new measure is suggested:the number of alternative pairs in complete order given by WSCE for which the superiority of one alternative upon the other depends 011 DM’s preferences.They are called as potentially contradictory pairs (PCA). It is shown that PCA created from the elements of the first Pareto-layer very reliably represent PCA in a complete order in the case of additivity.This makes it possible to only use PCA to measure differences in DM’s preferences.