ASSESSMENT ON THE EFFECTIVENESS OF DESIGN-BUILD VERSUS DESIGN-BID-BUILD PROJECT DELIVERY METHOD IN FEDERAL ROAD CONSTRUCTION PROJECTS
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2013-12
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Addis Ababa University
Abstract
The Federal Democratic Republic of Ethiopia has placed increased emphasis on improving the quality and size of the road infrastructure. In order to meet this Ethiopian Roads Authority is assigned by the Federal Government as an implementing agency to follow up the execution of the federal road construction projects to be timely and cost effective. As literatures show absence of proper project delivery system is one of the reasons for long delay and cost increment on many projects. This research therefore, tries to analyze the performance of DBB and DB project delivery systems to see whether one is more effective than the other with regard to time and cost. The study also evaluates which delivery method is the better approach to meet the needs of Ethiopian Federal roads projects. In order to assess the effectiveness of DB versus DBB for federal road projects the literature review is conducted and factors were explored that can influence the successful and proper implementation of project delivery system for Ethiopian Federal road projects. The questionnaire survey and case studies together with desk study are applied and data was collected from samples of 5 DBB and 5 DB federal road projects. The collected data has been analyzed and interpretations and discussions are made on the results. The findings of this research revealed that, if the contractors properly identify and consider their risks DB project delivery system would be more effective than DBB. The research also indicated that projects delivered using the DB approach performed better than those delivered through the DBB delivery systems. Specifically, the analysis revealed that the DB projects experienced less cost and schedule growth. DB project delivery system has increasingly been adopted worldwide due to its many advantages. However, Ethiopian federal road projects were delivered using the traditional DBB, and it is very recently that ERA is trying to implement the innovative project delivery system on some projects. The result of this research is therefore encouraging and very helpful for ERA in its leap from DBB to DB. The research further provides conclusion and recommendations under what circumstances the project delivery system is more feasible and effective to Federal road construction projects.
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Federal Democratic Republic