1. CARME – Centre of Applied Research in Management and Economics, School of Technology and Management Polytechnic of Leiria, Leiria, Portugal
2. Mathematics and Natural Sciences, School of Education and Social Sciences Polytechnic of Leiria, Leiria, Portugal
3. Mathematics, School of Technology and Management Polytechnic of Leiria, Leiria, Portugal
4. CEAUL - Center of Statistics and Applications, University of Lisbon, Lisbon, Portugal
5. CDRSP - Centre for Rapid and Sustainable Product Development, School of Technology and Management Polytechnic of Leiria, Leiria, Portugal