Ce séminaire est co-organisé par le département de gestion des opérations et de la logistique de HEC Montréal. Il aura lieu à la salle ACCRA (1er étage, section jaune).

This talk presents recent research projects we have developed during a one-year period as a visiting researcher at the Department of Logistics and Operations Management at HEC Montreal. We begin with a brief discussion of the classification of the integrated lot-sizing literature based on the framework provided by the Supply Chain Planning Matrix. We then present three studies on the integrated lot-sizing and cutting stock problem. The first study is motivated by a real-life concrete pole manufacturing application and considers multiple manufacturing modes. The second incorporates purchasing decisions for steel trusses (objects) within the integrated problem and is inspired by a lattice slab production company. The third investigates the coordination of sourcing, production, cutting, and transportation decisions within a unified optimization framework. These problems are addressed using column generation and arc-flow formulation approaches. Next, we discuss recent research on integrated lot-sizing and blending problems under demand uncertainty, for which we propose both two-stage and multi-stage stochastic programming approaches. Finally, we address the sugarcane rebalancing problem under harvesting and processing disruptions, for which a mathematical model is proposed and solved using a commercial optimization solver.