In Piñeyro and Viera (2010) (Int. J. Prod. Econ. 124 (2), 2010, 482–488) we investigate a lot-sizing problem with different demand streams for new and remanufactured items, in which remanufactured products can be substituted by new products, but not vice versa. In this note we correct some...

We address the economic lot sizing problem with product returns and remanufacturing. For this problem we provide a new theoretical result about the form of the optimal solutions that can be considered a generalization of the well-known zero-inventory property. Based on this result we suggest an...