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The design-build delivery method is increasingly used due to the numerous advantages it can offer to a project. An important issue associated with design-build delivery is the procurement method used to select the design-build team. It is a critical decision that involves several key project team members and requires the owner to carefully select the design-build team expected to successfully deliver the project. This research quantitatively studies the correlation between the design-build procurement method and the performance of the design-build project with regard to cost, time and quality. The procurement methods studied are: sole source, qualifications-based, fixed budget/best design, best value, and low bid selection.Procurement definitions are presented based on a literature review. Data was collected through a survey from 76 U.S. design-build projects. A careful review and categorization process followed the data collection phase. Various statistical tests were performed to analyze the data. The cost growth metric relationship with the procurement methods was statistically verified, showing projects procured using low bid selection incurred a higher cost growth than projects procured using other methods. Several other trends illustrating the effect of adopting each procurement method on project performance were identified. Design-build projects procured using the sole source selection method seemed to result in the highest project intensity. Also, the lowest schedule growth appeared to be associated with the best value procurement method.Based on the patterns and relationships identified, a better understanding of the procurement process and how it may affect the project performance is achieved. The impact of project-specific factors, such as the level of project complexity and the level of design completed at the time of the procurement, on the design-build project performance were examined. Guidelines are defined to assist owners in selecting the design-build team procurement method that responds to their project goals. Guided by these recommendations, owners can improve their selection decision process for design-build projects.iv

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