1. Poznan University of Technology , Faculty of Engineering Management , Pl. Marii Skłodowskiej-Curie 5,60-965 Poznań , Poland
2. Czestochowa University of Technology , Faculty of Management, Department of Production Engineering and Safety , Al. Armii Krajowej 19B, 42-200 Czestochowa , Poland
3. University of Maribor , Faculty of Logistics , Mariborska 7 , Celje , Slovenia