APPLICATION OF BLOCKCHAIN IN PROCUREMENT AND MANAGEMENT OF BUILDING SERVICES: A CRITICAL AND SYSTEMATIC REVIEW

Building services systems are essential for creating a comfortable and safe living environment in buildings. These are complex systems with high stakeholder involvement, a lengthy lifecycle, and high financial costs. This leads to building services systems having complex procurement and management (P&M) requirements which create a multitude of challenges. Blockchain technology has emerged as a revolutionary digital technology under "Procurement 4.0". The purpose of this paper is to investigate the applicability of blockchain technology for systematic procurement and management of building services. The science mapping method was used to systematically and quantitatively analyse 102 publications related to bibliographic records retrieved from Scopus and the Web of Science databases. This includes content analysis of the existing issues, current trends of technologies, and applicability of blockchain in the P&M of building services. The results of the bibliometric analysis indicate that publications had grown significantly faster in 2021 related to the P&M of building services with new technologies while there is a minimal collaboration of countries, organisations and authors in publishing research in this area. Further, it is observed that Building Information Modelling (BIM) is the main technology utilised in general P&M. As a result of content analysis, a total of 28 issues that affect the performance of procurement and management of building services are identified. The paper critically evaluates blockchain technology in terms of peer-to-peer networks, hashing algorithms, public key cryptography, consensus mechanisms, smart contracts, and distributed ledger. It indicates that blockchain provides a perfect match for resolving these issues. The findings of the research will open a path to apply blockchain technology in building services. The study offers a readily available point of reference for practitioners, policymakers and research and development bodies.