1. Dean's Assistant for Scientific Research and Graduate Studies, Faculty of Engineering Technology, Al-Balqa Applied University, PO. Box 330116, Amman - 111 34, Jordan.
2. Al-Balqa` Applied University, Faculty of Engineering Technology, Amman, Jordan.
3. 3Jordan University of Science and Technology, Industrial Engineering Department, Irbid, Jordan.
4. Al-Balqa` Applied University, Al-Hosun College, Irbid, Jordan.