1. Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
2. Group of Construction Research and Innovation (GRIC), Department of Project and Construction Engineering (DPCE), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
3. Department of the Built Environment, Birmingham City University, Birmingham B4 7XG, UK
4. Faculty of Engineering and the Built Environment, University of Johannesburg, Johannesburg 2092, South Africa