Effectiveness of Project Delivery Systems in Executing Green Buildings

This paper presents an overview of the most recent works on project delivery systems, with a particular interest in green buildings. The review focuses on current and prior studies that critiqued the intricacies, strengths, and weaknesses of project delivery systems as well as studies that addressed their performance, whether in green or nongreen built environments. Green buildings are vulnerable to cost overruns and delayed schedules as a result of the challenging complexities in their implementation. There is a greater need for building professionals to cooperate more cohesively in a nonsequential manner to achieve green building objectives, which necessitates exploring the different delivery systems that dictate how different project stakeholders are involved. The findings of this systematic review detected recent research trends in project delivery systems and synthesized a clearer elucidation of their intricacies and how they perform in a green building context. Most recently, integrated project delivery, design and build, and construction management at risk were the most frequent topics of study, with cost and time performance metrics dominating their quantitative comparisons. This review encourages future work to focus on quality and risk performance because these domains are more essential for green buildings owing to their organizational and technological complexities. This review's contribution will set the groundwork for academic researchers to explore new avenues in evaluating project delivery systems as well as in supporting decision makers in proper judgements on which delivery system to choose to achieve project success.