Line–cell conversion and rotation of operators between cells are common in lean production systems. Thus, the purpose of this study is to provide an integrated look at these two practices through integrating job rotation scheduling and line-cell conversion problems, as well as investigating the effect of rotation frequency on flow time of a Seru system.,First, a nonlinear integer programming model of job rotation scheduling problem and line–cell conversion problem (Seru-JRSP) was presented. Then, because Seru-JRSP is NP-hard, an efficient and effective invasive weed optimization (IWO) algorithm was developed. Exploration process of IWO was enhanced by enforcing two shake mechanisms.,Computations of various sample problems showed shorter flow time and less number of assigned operators in a Seru system scheduled through job rotation. Also, nonlinear behavior of flow time versus number of rotation periods was shown. It was demonstrated that, setting number of rotation frequency to one in line with the literature leads to inferior flow time. In addition, ability of developed algorithm to generate clusters of equivalent solutions in terms of flow time was shown.,In this research, integration of job rotation scheduling and line–cell conversion problems was introduced, considering lack of an integrated look at these two practices in the literature. In addition, a new improved IWO equipped with shake enforcement was introduced.

中文翻译：

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Seru 系统中的作业轮换调度：动摇强制侵入性杂草优化方法

在精益生产系统中，生产线单元转换和单元间操作员轮换很常见。因此，本研究的目的是通过整合作业轮换调度和线单元转换问题，以及研究轮换频率对 Seru 系统流动时间的影响，对这两种实践进行综合观察。提出了作业轮换调度问题和线单元转换问题的非线性整数规划模型(Seru-JRSP)。然后，由于 Seru-JRSP 是 NP-hard，因此开发了一种高效且有效的侵入性杂草优化 (IWO) 算法。IWO 的探索过程通过执行两个抖动机制得到加强。各种样本问题的计算表明，在通过工作轮换安排的 Seru 系统中，流动时间更短，分配的操作员数量更少。还，显示了流动时间与旋转周期数的非线性行为。结果表明，根据文献将旋转频率设置为 1 会导致流动时间较差。此外，还展示了所开发算法在流动时间方面生成等效解簇的能力。在本研究中，考虑到缺乏对这两种实践的综合观察，引入了作业轮换调度和线单元转换问题的集成在文献中。此外，还引入了一种新的改进型 IWO，配备了震动执法装置。展示了开发算法在流动时间方面生成等效解簇的能力。在本研究中，考虑到文献中缺乏对这两种实践的综合研究，引入了作业轮换调度和线单元转换问题的集成. 此外，还引入了一种新的改进型 IWO，配备有震动执法。展示了所开发算法在流动时间方面生成等效解簇的能力。在本研究中，考虑到文献中缺乏对这两种实践的综合研究，引入了作业轮换调度和线单元转换问题的集成. 此外，还引入了一种新的改进型 IWO，配备了震动执法装置。