MACBETH (measuring attractiveness by a categorical based evaluation technique) is an interactive multicriteria decision aid approach used to build a quantitative (numerical) value model, based on qualitative (nonnumerical) pairwise comparison judgments. The MACBETH value‐elicitation procedure described in this article is composed of an input stage aimed at eliciting a consistent set of qualitative judgments of difference in attractiveness between options, and an output stage aimed at constructing an interval value scale from the set of judgments, which numerically measures the relative attractiveness of options for the person or group that made the judgments.