基于排队论算法的车间在制品管理系统设计与实现

发布时间：2018-03-23 14:31

本文选题：排队论　切入点：在制品　出处：《浙江理工大学》2017年硕士论文

【摘要】：在制品管理作为车间管理的重要环节,直接决定着企业的经营状况。如果车间在制品水平偏高,导致企业现金流不良、客户订单无法按期交付;如果车间在制品水平偏低,则导致生产资料浪费,企业利润率下滑。因此如何调控生产线在制品水平,在平稳生产的前提下,寻找最优的在制品分布状态成为车间管理的关键问题。排队论作为运筹学的一个分支,大量适用于排队或拥挤场景,同样适用于车间生产过程的在制品优化问题。本文在分析国内外研究现状的基础上,引入了基于排队论算法寻找理想在制品数量和生产周期的方法。该方法视生产过程为排队问题,建立了数学模型对在制品问题进行量化求解。为了验证方法的有效性,设计了基于排队论的在制品管理系统。该系统以MBT组态软件为开发平台,将排队论算法和数据展示程序写成了python代码模块,并利用了电子看板的形式进行可视化展示。同时本文使用了实际与理想在制品数量的偏离程度对在制品状态进行等级化描述。完成管理系统的设计后,需要对系统进行软件测试。本文主要进行了排队论算法的程序测试和电子看板展示的网络稳定性测试,程序测试使用了黑盒测试的方法,以winQSB仿真结果作为预期输出结果,最终该程序通过了测试;网络稳定性测试主要观察网络断开、网络连接不稳定、网络连接稳定三种情况下的电子看板的表现。在完成以上所有工作后,以A公司为例,验证了理论的正确性和管理系统的实用性。该公司拥有10条生产线,其中T生产线出现了在制品水平偏高且分布不均衡的问题。经过三个月的上线使用,T生产线在制品水平显著下降,各工序在制品分布均衡且生产平稳。用这个实例有效验证了基于排队论算法的在制品管理系统在车间在制品管理方面显著的效果。
[Abstract]:WIP management, as an important part of workshop management, directly determines the management status of the enterprise. If the level of WIP in the workshop is too high, the cash flow of the enterprise is poor, and the customer orders cannot be delivered on time; if the WIP level in the workshop is on the low side, Therefore, how to control the production line WIP level, under the premise of smooth production, It is a key problem in workshop management to find the optimal distribution of WIP. As a branch of operations research, queuing theory is widely used in queuing or congestion scenarios. It is also applicable to the in-process optimization of workshop production process. This paper introduces a method based on queuing theory to find the number and production cycle of ideal WIP. The method regards the production process as a queuing problem, and establishes a mathematical model to solve the WIP quantitatively. In order to verify the effectiveness of the method, A WIP management system based on queuing theory is designed, which is based on MBT configuration software. The queuing theory algorithm and data display program are written into python code module. At the same time, this paper uses the deviation degree of actual and ideal WIP to describe the status of WIP in a hierarchical way. After the design of the management system is completed, In this paper, the program test of queuing theory algorithm and the network stability test of electronic Kanban display are carried out. The method of black box test is used in the program test, and the winQSB simulation result is taken as the expected output result. Finally, the program passed the test; the network stability test mainly observed the performance of electronic Kanban in three cases: network disconnection, network connection instability and network connection stability. To verify the correctness of the theory and the practicability of the management system, the company has 10 production lines, Among them, the problem of high WIP level and uneven distribution occurred in T production line. After three months of on-line use of WIP, the WIP level of T production line decreased significantly. The distribution of WIP in each process is balanced and the production is stable. The effectiveness of the WIP management system based on queuing theory algorithm in workshop WIP management is verified effectively with this example.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB497

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