1. Professor, Dept. of Enterprise Engineering, Univ. of Rome “Tor Vergata”, via Politecnico 1, 00133 Rome, Italy (corresponding author).
2. Senior Research Engineer, Design Methods, Viale Regina Elena 207, 98121 Messina, Italy.
3. Ph.D. Student, Dept. of Enterprise Engineering, Univ. of Rome “Tor Vergata”, via Politecnico 1, 00133 Rome, Italy.
4. Research Engineer, Dept. of R&D, Piaggio Aerospace, Viale Generale Disegna 1, Villanova d’Albenga, 17038 Savona, Italia.