1. Department of Organization Engineering, Business Administration and Statistics, Escuela Técnica Superior de Ingenieros Industriales (ETSII), Universidad Politécnica de Madrid (UPM), c/José Gutiérrez Abascal 2, 28006 Madrid, Spain
2. Food and Retail Operations Lab, Center for Transportation and Logistics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
3. Department of Industrial Engineering, Universidad Mayor de San Andrés, Calle J.J.Perez, La Paz, Bolivia