Dr. Abdulrahman Ibrahim Al-KhedhairiNationality : Saudi.Associate ProfessorFaculty Of Science - King Saud UniversityDepartment of Statistics and Operations ResearchDean of Faculty of Science in Al-KharjOffice: +96614676338 +96615453642Fax : +96614676274 +96615453658Email: akhediri@ksu.edu.saP.O. Box: 2455 Riyadh: 11451 Saudi Arabia