1. Department of Engineering Management, Faculty of Industrial Design and Business Management, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
2. Department of Management, Research Center for Engineering and Management (RCEM), Faculty of Management in Production and Transportation, Politehnica University of Timișoara, 300006 Timișoara, Romania
3. Faculty of Transportation, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania