A fuzzy sets based contractor prequalification procedure

Contractor prequalification makes it possible to admit for tendering only competent contractors. The paper presents a proposal for contractor prequalification schema involving two stages of prequalification: “on a standing list” and “per project”. A model of prequalification employing the theory of fuzzy sets to evaluate the “per project” contractors is precisely described. A simple numerical example illustrates the model operation and a description of a program supporting the prequalification procedure follows.