1. Research Fellow, Dept. of Industrial Engineering, Univ. of Padova, via Gradenigo 6/a, 35131 Padova, Italy (corresponding author).
2. Research Fellow, Centre of Studies and Activities for Space, Univ. of Padova, via Venezia 15, 35131 Padova, Italy.
3. Professor, Dept. of Industrial Engineering, Univ. of Padova, via Gradenigo 6/a, 35131 Padova, Italy.