This paper reports a new multi-item planning and scheduling problem in a job-shop production
system with the consideration of energy consumption. A mixed integer linear programming
is proposed to integrate planning and scheduling with the consideration of energy
aspect. In this study a new operational constraint is considered in the tactical level because
of the huge interest given to energy consumption and its strong link existing with production
system. To evaluate the performance of this model, computational experiments are
presented, and numerical results are given using the software CPLEX and then discussed.