Pre-Qualification Model for Contractor Selection by FAHP

Abstract

          The objective of this study was to develop Pre-Qualification model for contractor selection using Fuzzy Analytic Hierarchy Process (FAHP). The FAHP generates a weight for each evaluation criterion according to the decision maker’s pairwise comparisons of the criteria. Base on the intuitive and subjective judgments of experts 8 persons from project manager 2 persons from construction manager 2 persons from quantity survey 2 persons and from contractors 2 persons. The expert’s creativity scores on a couple for the calculating weighted rating of the 5 eligibility factors. For example, the project control with 5 sub-factors (10 pairs of comparison partners), the human resources with 3 sub-factors (3 pairs of comparison partners), the material purchase with 2 sub-factors (1 pairs of comparison partners), the machine-tool-related with 3 sub-factors (3 pairs of comparison partners) and the safety and environment with 3 sub-factors (3 pairs of comparison partners) which over all 20 pairs become the input of the model. The weighted values of main factors of the project control, the human resources, the material purchase, the machine-tool-related and the safety and environment are 0.39, 0.22, 0.07, 0.23 and 0.09 respectively. In this study, the situation of technical assessment of contractors in 4 construction projects was determined. By comparing the results of the model with the results determined by the project owner. The results from the 1^st project, the 2^nd project and the 3^rd project results reveal that as same the project owner, But the 4^th project, the winner of the selection was changed from the contractor N to the contractor P. results from the contractor P had a higher total technical score than the contractor N. Finally, the model used to evaluate has clear details. More coverage than ever and remains consistent with the assessment results of the project owners.