1. Kranz Wolfe Associates 3020, Herent Belgium (e-mail: ilkan.sarigol@kranzwolfe.com).
2. Department of Industrial Engineering, American University of the Middle East, Dasman 15453 Kuwait (e-mail: Erkan.Bayraktar@aum.edu.kw).
3. Department of Industrial Engineering, Yildiz Technical University 34349, Istanbul Turkey (e-mail: cozkan@yildiz.edu.tr).