Improved design coordination can minimize project uncertainty by decreasing disruption, and reducing waste in the construction processes. While the relationship between coordination and uncertainty is understood, there is little empirical evidence that quantifies the linkage. This paper explores the effects of design coordination on project uncertainty, and demonstrates that investments in design coordination can typically return savings to building projects by reducing field-generated change orders and disruptions. Evidence is provided to demonstrate the cost-benefit relationship between investment in coordination planning and the cost of field conflicts. The effects of project delivery systems on the coordination process are examined through a comparison of the coordination process on fourteen laboratory construction projects. Suggestions for characterizing coordination effort based on project type and delivery system are provided and recommendations are made for future research on the time and cost metrics of the coordination process.
Design coordination, Variability, Work Flow