The Impact of Project Delivery Methods on Subcontracting: USAF Construction Projects Case Study

Abstract

This thesis investigates subcontracting practices in the construction industry, specifically focusing on U.S. Air Force (USAF) construction projects. It explores the nuances and challenges of different project delivery methods, namely Design-Bid-Build (DBB) and Design-Build (DB), and their impact on subcontracting. The study builds upon existing research, emphasizing the influence of prime contracts on subcontractor selection, project management, risk and scope sharing, contract specifications, and financial considerations. The research uncovers key trends and preferences in subcontractor qualifications through comprehensive interviews with industry professionals, highlighting a priority on technical expertise and local knowledge over cost. It examines the complexities in project execution under DBB and DB methods, revealing the efficiency of Design-Build Subcontracting (DBS) in reducing project delays and enhancing collaboration. The study also delves into the risk distribution in subcontracting, finding that DB fosters shared risk and trust among contractors, contrasting the more risk-averse nature of DBB. Furthermore, the thesis addresses contract and specification challenges specific to Air Force projects, such as outdated designs and the necessity for proprietary products. It discusses the financial implications of subcontracting, including the potential for inflated costs due to project uncertainties and niche subcontractor markets. Conclusively, the thesis identifies gaps in current knowledge and suggests directions for future research, advocating for a broader exploration of subcontracting practices in various military and federal contexts and a deeper understanding of subcontractor perspectives. This work contributes to the discourse on subcontracting in construction, offering valuable insights for practitioners and policymakers engaged in USAF and similar large-scale construction projects.