1. RISE Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Brescia, Italy
2. DIEF, University of Florence, Firenze, Italy
3. Department of Management, Information and Production Engineering, Università degli Studi di Bergamo, Dalmine, Italy
4. IBM Italia S.P.A., Segrate, Italy
5. Canon Italia S.P.A., Cernusco Sul Naviglio, Italy