Nikiforos Stamatiadis, Roy Sturgill, Kiriakos Amiridis and Timothy Taylor
Estimating Constructability Review Benefits for Highway Projects
Abstract: Constructability review is a process used in the design phase of a project in order to interject construction knowledge and address potential issues prior to construction. This typically occurs with a team or panel of constructability reviewers. Current staffing and budgetary constraints have resulted in state transportation agencies being very careful about disturbing the existing project development process with practices that seemingly lie outside the main process, such as constructability review. An issue that constructability reviews face is the lack of any documented savings. Over the past decade, the Kentucky Transportation Cabinet has streamlined the constructability review process by relying on a smaller team or single reviewer per project and recently taken on an effort to estimate monetary benefits from such reviews. This paper discusses the evaluation of constructability reviews at the project level by comparing change order percentages on projects reviewed versus those not being reviewed. This approach showed a clear indication that there are monetary savings associated with constructability reviews resulting in a conservative savings estimate of 1.25 percent of the project cost without including the additional inherent savings in time, lessons learned or other aspects not readily quantifiable. This evidence presents that a streamlined constructability review process and team can still provide savings to a project. A regression model was also developed in this work to estimate the potential monetary gains from the constructability review comments but additional analysis is needed to improve accuracy. There is potential that this model could be used to further streamline the process by identifying and focusing on projects where constructability review savings could be maximized.
Keywords: Constructability Review, Design, Quality Assurance
Full text: content.pdf (374,168 bytes) (available to registered users only)