1. BTS CSCO Advisory, Cloud Success Services, SAP Deutschland SE & Co. KG, Hasso-Plattner-Ring 7, 69190 Walldorf, Germany
2. Business Organization Department, ROGLE, Universitat Politècnica de València, Camino de Vera S/N, 46022 Valencia, Spain
3. Department of Industrial Engineering, University of Applied Sciences Ansbach, Residenzstraße 8, 91522 Ansbach, Germany