1. Tampere University, Hervanta Campus, Faculty of Business and Management, Unit of Industrial Engineering and Management, Korkeakoulunkatu 8, 33720 Tampere, Finland
2. LIUC Università Cattaneo, School of Industrial Engineering, Corso G. Matteotti 22, 21053 Castellanza (VA), Italy
3. Politechnico di Milano, School of Management, Via R. Lambruschini 4/b, 20156 Milano (MI), Italy