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首页> 外文期刊>International Journal of Production Research >Modelling of material handling systems for facility design in manufacturing environments with job-specific routing
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Modelling of material handling systems for facility design in manufacturing environments with job-specific routing

机译：具有特定工作路线的制造环境中用于设施设计的物料搬运系统建模

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Traditionally, flow times distance is used as a surrogate for cost in facility design. However, this performance measure does not fully capture the impact of facility design decisions on operational performance measures such as cycle time and work-in-progress in the system, which are often more meaningful for managers, especially in a manufacturing environment. To better measure operational performance, modelling of material handling systems using a queueing network must be integrated in the facility design process. A number of approaches are discussed in the facility design literature for modelling material flow using queueing networks. In these approaches, Poisson arrival or Markovian job routing assumptions have been used. However, for many manufacturing environments, these assumptions lead to an inaccurate estimation of the material handling system's performance and thus lead to poor facility designs. Incorporating more general queueing results for non-Markovian systems is difficult, however, because the facility design process must investigate a large number of potential solutions and thus the results from the queueing models for the material handling system must be quickly obtained. In this paper, the need for more general queueing models of material handling systems in facility design is confirmed. Then, an approach based on multi-class queueing models is adapted to capture the change in variability of the system performance caused by both different arrangements of workstations in the facility and different arrival processes to the workstations due to the job routing in a computationally efficient manner. The proposed modelling approach is shown to provide more accurate results than previous methods used in facility design based on numerical comparisons with results from discrete-event simulation.
机译：传统上，流量乘以距离是设备设计成本的替代指标。但是，这种性能度量不能完全反映设施设计决策对系统性能的影响，例如周期时间和系统中的在制品，这通常对管理人员来说更有意义，尤其是在制造环境中。为了更好地衡量运营绩效，必须在设施设计过程中集成使用排队网络对物料搬运系统进行建模的功能。在设施设计文献中讨论了许多使用排队网络对物料流进行建模的方法。在这些方法中，使用了Poisson到达或Markovian工作路由假设。但是，对于许多制造环境，这些假设导致对物料搬运系统性能的估计不准确，从而导致设施设计不佳。但是，对于非马尔可夫系统，很难纳入更一般的排队结果，因为设施设计过程必须调查大量潜在的解决方案，因此必须快速从物料搬运系统的排队模型中获得结果。在本文中，确定了在设施设计中需要更通用的物料搬运系统排队模型。然后，基于多类排队模型的方法适用于以高效计算的方式捕获由于设施中工作站的不同布置以及由于作业路由而导致的工作站到达过程不同而导致的系统性能可变性的变化。 。基于数值比较与离散事件模拟的结果，所提出的建模方法显示出比设施设计中使用的先前方法更准确的结果。

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