¹Middle East Technical University, Ankara, Turkey

Correspondence: E Karasakal, Industrial Engineering Department, Middle East Technical University, Ankara 6531, Turkey. E-mail: esra@ie.metu.edu.tr

Received September 2005; Accepted May 2007; Published online 25 July 2007.

Abstract

PROMETHEE is a powerful method, which can solve many multiple criteria decision making (MCDM) problems. It involves sophisticated preference modelling techniques but requires too much a priori precise information about parameter values (such as criterion weights and thresholds). In this paper, we consider a MCDM problem where alternatives are evaluated on several conflicting criteria, and the criterion weights and/or thresholds are imprecise or unknown to the decision maker (DM). We build robust outranking relations among the alternatives in order to help the DM to rank the alternatives and select the best alternative. We propose interactive approaches based on PROMETHEE method. We develop a decision aid tool called INTOUR, which implements the developed approaches.