1. 1Department of Quantity Surveying, Faculty of Built Environment, Tunku Abdul Rahman University College, Jalan Genting Kelang, Setapak, Kuala Lumpur Malaysia .
2. 2Department of Quantity Surveying, Faculty of Engineering and Quantity Surveying, Inti International University, Persiaran Perdana BBN Putra Nilai, Negeri , Sembilan Malaysia .
3. 3Department of Quantity Surveying, Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, Selangor, Malaysia .
4. 4Department of Quantity Surveying, Faculty of Built Environment, Universiti Management dan Teknologi Tunku, Abdul Rahman (TARUMT), Malaysia .
5. 5Department of Quantity Surveying, Faculty of Engineering and Quantity Surveying, INTI International University, Nilai, Negeri Sembilan Malaysia .