Effect of worker sequence on cycle time in a U-shaped line with chase mode
Effect of worker sequence on cycle time in a U-shaped line with chase mode
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DOI：
10.1080/00207543.2016.1190472
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发表时间：
2017-05
影响因子：
9.2
通讯作者：
K. Nakade
中科院分区：
文献类型：
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作者：
K. Nakade
本文考虑了一条有多台机器的u型线，其中多个异构工人中的每一个都被分配到其中一台机器上作为他/她在这条线上的起始位置。假设为追逐模式，在这种模式下，工人们处理所有的任务，并在同一条路线上行走。讨论了追逐模式下u形线循环时间的周期性，其中周期性是指每个工人行走所需的时间是循环的，并且取决于工人序列的顺序。当它是周期性时，产品产出的总周期时间大于系统的基本周期时间，即工人和机器的总任务时间除以工人数量的最大值。结果表明，如果只有两个工人，则周期时间没有周期性。三个工人的实例表明，工人在生产线上的顺序有时对循环时间的长度和周期性有很大的影响。对于三个或更多的工人案例，推导出没有周期性的充分条件。
In this paper, a U-shaped line with multiple machines is considered, where each of multiple heterogeneous workers is allocated to one of machines as his/her starting position along the line. The chase mode is assumed, in which workers deal with all tasks and walk around on the same route. Periodicity of cycle time of a U-shaped line in chase mode is discussed, where periodicity means that time necessary for each worker to walk around is cyclic and depends on the order of worker’s sequence. When it is periodic, the overall cycle time on the output of products becomes greater than the fundamental cycle time of the system, which is the maximum among total task times on workers and machines divided by the number of workers. It is shown that if there are just two workers then there is no periodicity of cycle time. Examples for three worker case show that the order of workers on the line sometimes highly influences on the length and periodicity of cycle time. The sufficient conditions under which there is no periodicity are derived for three or more worker cases.