Concordance Analysis is termed a non-compensatory multi criteria decision making model. It utilise a number of mathematical functions to indicate the degree of dominance one option or group of options has over others under consideration, while not requiring all options to be directly linked within the ranking three (Massam.1998). the conclusion of in comparability between some actions may be quite helpful, since it highlights some aspects of the problem that would perhaps deserve a more thorough study. within Concordance Analysis, there is no question of the 'trading-off' of one criterion directly against another another for each individual option. In contrast is classified using a single score which represents the attractiveness or utility of an option. The selection of a preferred plan is based upon these scores. They rely on the principle that trade-offs between criteria are legitimate so that a utility score of each option can be determined(Rogers and Bruen,1995)
with Concordance Analysis,the comparison of project options takes place on a basis with respect to each criterion an establishes the degree of dominance that one option has over another. the main measure of this dominance of one option over another is the concordance score. For a given pair of options (a,B), comparison of their is built up .Thus, if option a is at least as good as option b on criterion j.then: