Analysis of Construction Contractor Selection and Evaluation Based on AHP and GRA

Under the background of economic globalization and market competition, many enterprises regard contractors as a part of enterprise resource management in order to realize the whole value chain of the lowest cost, the greatest benefit. Because of the chooser's subjectivity in contractor selection and the incompleteness in obtaining the contractors information, it is hard to make the best choice by traditional method, which eventually influences the interest of the owner. On the circumstance of incomplete information in the contractor selection, the improved grey correlation evaluation model is advanced based on the AHP and GRA. At the same time, it will do the optimized selection. The evaluation model, which changes a qualitative problem into a quantified one, relatively solved many complex and multi-factor, decision-making problems in the process of selecting and evaluating contractors, such as incomplete information, excessive evaluating index and some related or repeated index. We can confirm the feasibility and effectiveness of the method through the instance analysis of the choice of construction contractors.