1. Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha, State of Qatar;
2. Optimisation et Analyse des Systèmes Industriels et de Service, Ecole Nationale d‘Ingénieurs de Tunis, Université de Tunis El Manar, 1002 Tunis, Tunisia;
3. Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia 24061