Abstract
TOC (Theory of Constraints) is well known as the management theory that pays attention to the bottleneck resource. There are many papers that discuss the about TOC. At the production management, TOC scheduling aims to use bottleneck machine effectually. Many scheduling methods are match for flow shop problems. One scheduling method has been extended in order to apply the job shop problem that the objective function is minimization the make span. However, the operations time are determined, there are some case that operations time are variable in real production situation. Therefore, in this paper, we consider a statistical change of the operation times. The method has three important steps. Firstly, the bottleneck machine is searched. Secondly, drum schedule (operation sequence on the bottleneck machine) is decided. Thirdly, other machines schedules are decided by following the drum schedule. Moreover, we show the efficiency of our proposal methods and describe about influence of many conditions by numerical experiments.
