In many realistic situations, a job processed later consumes more time than the same job when it is processed earlier; this phenomenon is known as deteriorating jobs. However, job deterioration is relatively unexplored in the context of group technology. In this paper, we consider deterioration in the framework ofminimizing themakespan and the total completion time in single-machine group sched...

In this note, we investigate the effects of deterioration and learning in single-machine scheduling problems. Although the learning effect and the concept of deteriorating jobs have been extensively studied, they have never been considered simultaneously. It is shown in several examples that the optimal schedule of the problem may be different from that of the classical one. Nevertheless, the m...