Contractor Selection Using a Combination of Multi Attribute Utility Theory and

The over-increasing speed of development has made the issue and process of contractor selection an important factor in success of industrial projects in the form of desirable quality، cost and time (duration). This paper presents a model for contractor selection in construction projects by combining Multi Attribute Utility Theory (MAUT) and «Electre I» method. In this regard، while studying the background and history of the issue، related criteria and sub-criteria are identified and classified. Then، using views of experts، major criteria and sub-criteria and also their analogous weights are determined. In next step، based on minimum and maximum utility quantities in each sub-criterion and assuming neutrality of viewpoint of decision maker in relation to risk، single sub-criterion utility functions are computed. Using these functions، utility quantities analogous with levels and quantities of criteria in each of the decision alternatives are determined and decision matrix is formed based on these utilities. Then using Electre I method، decision alternatives are ranked. Based on findings of this research، in order to achieve long-term benefits of organizations، the contractor selection shall be done based on a comprehensive set of criteria and sub-criteria. While utilizing strength points of each of the two methods by combining Multi Attribute Utility Theory (MAUT) and Electre I method، an applied model with correct and accurate output for contractor selection in construction projects is developed.