Isabel Gomes

Citation:

Ramos, Tania, Maria Isabel Gomes, and Ana Paula Barbosa-povoa. "Recyclable packaging waste collection systems: redesigning service areas and collection routes in a real case-study." In 2nd International Conference WASTES: Solutions, Treatments and Opportunities. Braga, Portugal, 2013.

Date Presented:

Abstract:

This paper addresses the planning of a real recyclable packaging waste collection system operating in Portugal. The company’s logistics network is characterized by the existence of multiple depots and multiple products to be collected in each site. Service areas and vehicle routes are currently defined respecting the municipal boundaries and present a need for improvement. To study this problem mixed integer linear programming formulations have been developed allowing the redesign of service areas and of collection routes under two scenarios, respectively, considering the definition of service areas by depot and by material. The scenario where the current service areas are maintained and the collection routes are optimized is also studied. Savings up to 20% in total distance are achieved by redesigning service areas and collection routes.