[1] Univ Bung Hotta, Dept Quant Surveying, Padang, Indonesia
[2] Hong Kong Polytech Univ, Dept Bldg & Real Estate, Hong Kong, Peoples R China
[3] Natl Univ Sci & Technol, Dept Construct Engn & Management, Risalpur Campus, Risalpur, Khyber Pakhtunk, Pakistan
[4] Cent Univ Finance & Econ, Sch Management Sci & Engn, Beijing, Peoples R China