Purpose

Pull production systems have received much attention in the supply chain management environment. The number of Kanbans is a key decision variable in the pull production system as it affects the finished goods inventory (FGI) and backorders of the system. The purpose of this study is to compare the performance of the fixed and dynamic Kanban systems in terms of operational metrics (FGI and backorders) under the demand uncertainty.

Design/methodology/approach

In this paper, the system dynamics (SD) approach was used to model the performance of fixed and dynamic Kanban based production systems. SD approach has enabled the feedback mechanism and is an appropriate tool to incorporate the dynamic control during the simulation. Initially, a simple Kanban based production system was developed and then compared the performance of production systems with fixed and dynamic controlled Kanbans at the various demand scenarios.

Findings

From the present study, it is observed that the dynamic Kanban system has advantages over the fixed Kanban system and also observed that the variation in the backorders with respect to the demand uncertainty under the dynamic Kanban system is negligible.

Research limitations/implications

In a just-in-time production system, the number of Kanbans is a key decision variable. The number of Kanbans is mainly depended on the demand, cycle time, safety stock factor (SSF) and container size. However, this study considered only demand uncertainty to compare the fixed and dynamic Kanban systems. This paper further recommends researchers to consider other control variables which may influence the number of Kanbans such as cycle time, SSF and container size.

Originality/value

This study will be useful to decision-makers and production managers in the selection of the Kanban systems in uncertain demand applications.

中文翻译：

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固定和动态看板控制生产系统的系统动力学建模：供应链视角

目的

拉式生产系统在供应链管理环境中受到了很多关注。看板数量是拉式生产系统中的关键决策变量，因为它会影响系统的成品库存 (FGI) 和延期交货。本研究的目的是比较固定和动态看板系统在需求不确定性下的运营指标（FGI 和延期交货）方面的性能。

设计/方法/途径

在本文中，系统动力学 (SD) 方法用于对基于固定和动态看板的生产系统的性能进行建模。SD 方法启用了反馈机制，是在仿真过程中结合动态控制的合适工具。最初，开发了一个简单的基于看板的生产系统，然后将生产系统与固定和动态控制的看板在各种需求场景下的性能进行了比较。

发现

从目前的研究中可以看出，动态看板系统比固定看板系统具有优势，并且还观察到在动态看板系统下，延期交货相对于需求不确定性的变化可以忽略不计。

研究局限性/影响

在即时生产系统中，看板的数量是一个关键的决策变量。看板的数量主要取决于需求、周期时间、安全库存系数 (SSF) 和容器大小。然而，本研究仅考虑需求不确定性来比较固定和动态看板系统。本文进一步建议研究人员考虑可能影响看板数量的其他控制变量，例如周期时间、SSF 和容器大小。

原创性/价值

本研究将有助于决策者和生产经理在不确定需求应用中选择看板系统。