Role of prefabricated prefinished volumetric construction in enhancing construction productivity: Sri Lankan perspective

Abstract

Low productivity is an inherent characteristic of the construction industry. Prefabricated Prefinished Volumetric Construction (PPVC) is widely acknowledged for its high level of productivity. Thus, this study focuses on increasing the Construction Productivity (CP) in Sri Lanka through the implementation of PPVC. Herein, the research objectives are to explore the role of PPVC in increasing the CP and investigate the barriers to implementing PPVC in Sri Lanka. The research aim was accomplished by collecting data through expert interviews and analysing it through manual content analysis. Findings revealed that in Sri Lanka, the average CP rate can be doubled by implementing PPVC. Overall, PPVC increases the CP by reducing labour, accelerating project duration, making project management much more effective and minimising wastage. Nonetheless, the use of PPVC is relatively limited in Sri Lanka. The high initial cost is the main barrier to the adoption. Findings identified the necessity of specialised machinery, production plants, and skilled labour as the main cost drivers. Complications and high costs in transporting PPVC modules are critical barriers to the implementation of PPVC in Sri Lanka. Additionally, less demand, lack of technical expertise and less enthusiasm for research and development act as barriers. Most of the contractors do not have the technical capability needed for PPVC. Moreover, less governmental support and material shortages hinder the adoption of PPVC. Having an in-depth understanding of the barriers forms the foundation to tailor strategies and overcome the challenges. Accordingly, this research sheds light on the realm of concurring PPVC in Sri Lanka.