This seminar is co-organized by the Department of Logistics and Operations Management of HEC Montréal. It will take place in the ACCRA room (1st floor, yellow section).

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.