1. Faculty of Industrial Management, Universiti Malaysia Pahang, Kuantan, Malaysia
2. Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Kuantan, Malaysia
3. Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
4. Department of Civil Engineering, Canadian International College (CIC), Giza, Egypt