1. Department of Mechanical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department of Industrial Engineering and Management, International Hellenic University, Thessaloniki, Greece
3. Department of Engineering, School of Technology, University of Cambridge, Cambridge, UK
4. Department of Engineering Technology and Industrial Distribution, J. Mike Walker ’66 Department of Mechanical Engineering, Mosbacher Institute for Trade, Economics and Public Policy, Texas A&M University, College Stations, TX, USA