In today's industrial world, demand nature is changing where the customers are looking for a high variety of products. In order to meet varying customer demands, the firms should be flexible enough to produce parts in an efficient way. The flexible manufacturing systems have emerged with the progress in manufacturing technology. A flexible manufacturing system (FMS) is a computer-controlled pro...

in this paper, the flexible job shop scheduling problem with machine flexibility and controllable process times is studied. the main idea is that the processing times of operations may be controlled by consumptions of additional resources. the purpose of this paper to find the best trade-off between processing cost and delay cost in order to minimize the total costs. the proposed model, flexibl...

In this paper we study the job shop scheduling problem under the assumption that the jobs have controllable processing times. The fact that the jobs have controllable processing times means that it is possible to reduce the processing time of the jobs by paying a certain cost. We consider two models of controllable processing times: continuous and discrete. For both models we present polynomial...