A note on Simultaneously scheduling n jobs and the preventive maintenance on the two-machine flow shop to minimize the makespan

In Allaoui H., Lamouri S., Artiba A., Aghezzaf E., Simultaneously scheduling n jobs and the preventive maintenance on the two-machine flow shop to minimize the makespan. International journal of Production Economics 2008, 112, 161-167, several results are proposed. We show in this note that some of them are false. We also extend the analysis for some other results. (C) 2014 Elsevier B.V. All rights reserved.