Modelling the Returnable Transport Items (RTI) Short-Term Planning Problem
Résumé
Returnable transport items (RTI) are used for the handling and transportation of products in the supply chain. Examples of RTIs include plastic polyboxes, stillages or pallets. We consider a network where RTIs are used by multiple suppliers to deliver parts packed in RTIs to multiple customers. We address the short-term planning of empty-RTI flows (i.e., reverse flows) which consists of optimizing the transportation routes used to return empty RTIs from customers to suppliers. A transportation route consists of one or several trucks traveling from a customer to a supplier at a given frequency. The RTI short-term planning problem is critical because it impacts the continuity of loaded-RTI flows and affects the transportation and shortage costs of empty RTIs incurred at the very-short-term. We study a heterogeneous fleet of automotive parts RTIs, under two configurations: pool RTIs, which are standard RTIs shared between suppliers, and dedicated RTIs that are specific to each supplier. To solve the short-term planning problem, we develop a two-step approach using mixed-integer linear programming (MILP) and a greedy heuristic. For pool RTIs, our models enable a reduction of 30% in the number of trucks used and 20% in the distance traveled. Furthermore, if dedicated and pool RTIs are jointly planned, this would enable a 9% gain in terms of transportation costs.
Mots clés
Lakhmi
N. Sahin
E. Dallery
Y. Modelling the Returnable Transport Items (RTI) Short-Term returnable transportation item reverse logistics supply chain management optimization automotive industry MILP greedy heuristic
N.
Sahin
E.
Dallery
Y. Modelling the Returnable Transport Items (RTI) Short-Term returnable transportation item
reverse logistics
supply chain management
optimization
automotive industry
MILP
greedy heuristic
Domaines
Sciences de l'ingénieur [physics]
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Modelling_the_Returnable_Transport_Items_RTI_Short.pdf (3.45 Mo)
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