1. Social Training Services Center Shandong Institute of Commerce and Technology , Jinan, Shandong , China
2. National University of Science and Technology Politehnica Bucharest , Pitesti Regional Center, Pitesti, Romania
3. Jaipuria Institute of Management , A-32A, Sector 62 , Noida 201309 , India
4. College of Architecture and Design, Effat University , Jeddah 21478 , Saudi Arabia
5. Department of Mathematics, College of Science, King Khalid University , Abha 61413 , Saudi Arabia
6. Department of Management Sciences , ILMA University , Karachi , Pakistan