An investigation on the window lifter production line of an auto electronic factory shows that the final inspection process is the bottleneck of the production line. The cause is that it takes too long time for the EOL testing instrument to perform inspection. In this paper, the final inspection process is treated as a two-stage serial system with a single queue, single machine set, and work piece arriving in batches. Here-by , activity cycle diagram is applied to establish the corresponding production system model. Based on the model, simulation is carried out to analyze performance indexes, such as circle time, changes of work in process, EOL waiting time, and MC and EOL equipment utility rate. Then, improvement solution is pres-ented. By doing so, the circle time is shortened from 10. 4 s to 9. 4 s, and EOL equipment utilization rate is increased from 88. 6% to 90. 1% .%对某汽车电子厂车窗控制器生产线的现场调查表明:在该厂车窗控制器生产线的各个工序中,由于EOL检验仪器的检测时间较长,终检工序始终是整条生产线的瓶颈.本文将终检工序看作是单队、单台、工件成批到达、两个服务阶段的串联型排队系统.据此,采用活动循环图法建立相应的生产系统模型和仿真模型,并提出系统改进方案,通过比较完成N件产品检验的总时间、缓存量变化和EOL等待时间曲线、MC设备利用率以及EOL设备利用率等系统性能指标,对所提改善方案的仿真研究表明:改进后生产节拍约由改进前的10.4 s,提升到9.7s；瓶颈设备EOL的利用率从88.6％提高到90.1％.
展开▼
