Using “Choosing by Advantages” Method to Select Contractor for Design and Build Projects Toward Sustainable Construction

Contractor selection in Design and Build (D&B) projects that is not based on a comprehensive evaluation process will lead to undesirable situations affecting the project in many ways, from not promoting the advantages of the D&B model, extending the schedule, increasing project costs, reducing quality, causing great damage to the Investor. Multicriteria decision-making (MCDM) methods can help the project managers to select the best bidder. The main contribution of this study is to propose a comprehensive evaluation process of contractor's capacity based on Choosing by Advantages (CBA) method in D&B projects that considers the sustainability in construction. Actually, sustainable construction has become more and more important nowadays because it is not only related to environment protection but also to the business strategy of Employer. Data collected from documentation as well as in-depth interviews and surveys have been analyzed to determine the key factors that affect the decision of selecting a contractor. This research also explains why CBA is superior other MCDM methods, for this context.