The goal of MACBETH is to measure the attractiveness of options through a category-based evaluation technique. It is a multicriteria value-measurement procedure that uses qualitative judgments of differences in attractiveness to generate value scores for the options or weights for the criteria. To facilitate comparing options, two at a time, MACBETH introduces seven qualitative categories of difference in attractiveness: Is there no difference (indifference), or is the difference very weak, weak, moderate, strong, very strong, or extreme? Judgmental disagreement or hesitation between two or more consecutive categories, except indifference, is also allowed. MACBETH relies on such a pairwise comparison questioning mode. Each time a qualitative judgment is elicited, the consistency of all the judgments made by the respondent is verified, and suggestions are offered to resolve inconsistencies if they arise. MACBETH then derives scores for the options (or weights for the criteria) from the consistent set of judgments.
The authors of MACBETH are Carlos Bana e Costa, Jean-Claude Vansnick and Jean-Marie De Corte.
