[1] Fed Univ Technol Akure, Dept Quant Surveying, Akure 340110, Nigeria
[2] Univ Sains Malaysia, Sch Social Sci, George Town 11800, Malaysia
[3] Univ Johannesburg, CIDB Ctr Excellence, ZA-2092 Johannesburg, South Africa
[4] Prince Sattam Bin Abdulaziz Univ, Coll Engn Al Kharj, Dept Civil Engn, Al Kharj 11942, Saudi Arabia
[5] Birmingham City Univ, Dept Built Environm, Birmingham B4 7XG, W Midlands, England
[6] Covenant Univ Otta, Dept Bldg Technol, Otta 112104, Nigeria