Lot-sizing and scheduling in a glass container manufacture company Agostinho Agra* Department of Mathematics and CIDMA, University of Aveiro, Aveiro, Portugal E-mail: aagra@ua.pt *Corresponding author Catarina Avelino Department of Mathematics, University of Tr´ as-os-Montes e Alto Douro, Vila Real, Portugal E-mail: cavelino@utad.pt Adelaide Cerveira Department of Mathematics, University of Tr´ as-os-Montes e Alto Douro, Vila Real, Portugal E-mail: cerveira@utad.pt Alexandrino Delgado Department of Engineering Maritime Sciences, University of Cape Verde, Cape Verde, E-mail: Alexandrino.Delgado@unicv.edu.cv Michael Poss Department of Computer Science, Universit´ e Libre de Bruxelles, Brussels, Belgium E-mail: mposs@ulb.ac.be Abstract: We consider a real production planning problem occurring in a glass container manufacturing company. The goal is to minimize the average stock level during a planning horizon of one year, maintaining customers satisfaction (by minimizing stockouts) and keeping the production at its maximum rate. Besides the production capacity the