1. Technical Instructors Training Institute, Middle Technical University, Baghdad, Iraq
2. Power Generation Unit, Institute of Power Engineering (IPE), Universiti Tenaga Nasional (UNITEN), Kajang, Malaysia
3. Faculty of Engineering, Sohar University, Oman
4. Computer Technical Engineering Department, Al-Qalam University College, Kirkuk, Iraq
5. Operations and Information Management Department, Aston Business School, Aston University, Birmingham, UK
6. Mechanical Engineering Department, College of Engineering Universiti Tenaga Nasional (UNITEN), Kajang, Malaysia