This paper considers an integrated Inventory Location Routing problem ILRP which consists of optimizing the operating costs, risks and routing's CO2 emissions related to a Hazmat supply chain. The goal is to determine: the location of a set of capacitated depots to open, customers allocated to them, quantities delivered from these depots to customers per period, and the sequence in which customers are served by a heterogeneous fleet of vehicles. To solve the problem, an exact bi-objective model is designed and tested for small and medium size instances. A case study is proposed to prove industrial practicality of the model. The results show that the proposed solution resolves decently the medium size instances.

Abstract. In this work we consider an integrated Inventory Location Routing problem ILRP. The objective is to select depots to open, the routes to perform distribution from the capacitated depots to the clients by a homogeneous fleet of vehicles and over a multi-period planning horizon. To solve the problem, an exact model is designed in order to minimize the total cost (location, routing and inventory) and the routing CO2 emissions, while respecting transport and storage constraints for a hazardous material. We have also studied an industrial real case to illustrate the problem.