Performance of Design-Build Projects: Current State and Comparison between Project Characteristics

Abstract

This study attempts to quantitatively analyze performance of Design-Build (DB) projects completed in the last ten years from multiple perspectives. In order to improve the DB delivery method it is essential to observe the current state of performance and identify problems. Schedule growth and cost growth have been utilized to compare the project performances because of their measurability and objectivity. Further, the performance levels were compared between groups established according to building categories. It was observed that DB projects could achieve shortened schedule but the actual cost exceeded the proposal budget cost. Medical projects have shown the least of schedule variation with minimal delays. No significant association was discovered between the level of performance and the size of projects. It is concluded that the DB method is a more appropriate approach for owners and practitioners who are willing to achieve time saving, although risks in uncertainties of projects will be present. The main objective of this study is to provide owners and practitioners with better understanding of the DB delivery before they adopt it for their projects