Nowadays, industries are gradually shifting to offer mass customized products for their customers. However, mass customization requires flexible manufacturing systems. Hence several researchers are dedicated to optimize the design and the control of flexible manufacturing systems, of which reconfigurable manufacturing systems. Mass customization increases the complexity of production planning. This complexity also increases for flexible and reconfigurable manufacturing systems. This paper focuses on the complexity of planning and scheduling in reconfigurable manufacturing systems for mass customized products. It presents a simplified linear model to minimize the tardiness and its related penalty in scheduling by considering the reconfiguration time. Numerical experiments in CPLEX validate the model.