Nidhal Rezg is Professor at the University of Lorraine, France, and has been Director of the "Génie de Industriel, de Production et de de Maintenance" (LGIPM) laboratory in Metz since 2006. He has written approximately 60 articles in international journals. His research interests include the modeling, simulation and optimization of stochastic processes, reliability and maintenance and Petri nets. ... Read moreSofiene Dellagi is Assistant Professor at the University of Lorraine, France. He is a member of the "Génie Industriel, de Production et de Maintenance" (LGIPM) laboratory in Metz. His research works concentrate on reliability, maintenance, production management and the optimization of production systems of goods and services. Abdelhakim Khatab is Assistant Professor at the Ecole Nationale d’Ingénieurs de Metz, France. He is a member of the Maintenance and Production Management team of the "Génie Industriel, de Production et de Maintenance" (LGIPM) laboratory in Metz. His research works focus on reliability design and analysis, and maintenance optimization  of production systems of goods and services. Show Less