Abstract: The inventory plays an important role in the distribution system, as the excessive inventory and inadequate inventory are all able to bring negative effect on distribution system. In view of this, the problem of inventory level and ordering policy of distribution system is analyzed. In light of the large quantity of simulation scenario, low efficiency, and non-visual property of the traditional discrete event system simulation method, the paper formulates simulating model of distribution system based on the software platform of FLEXSIM. The 3D visualized discrete event simulation is conducted using theory of constraints. The new method optimizes the process of simulation, reduces the quantity of simulation scenario, and improves the efficiency. The simulation results also prove that the method is effective in enhancing the interactive effect of simulation.

Key words: inventory, distribution system, simulation and optimization, theory of constraints

摘要： 库存在配送系统优化过程中影响甚大，过高的库存或库存不足均会对配送系统造成不良影响。研究了连锁零售配送系统的配送中心和门店的两级库存水平和订货策略问题。通过在数学解析模型的优化结果基础上，应用三维可视化离散事件仿真方法建立了在FLEXSIM软件平台上的配送系统的仿真模型，并结合约束理论与系统仿真对仿真过程进行优化，缩减了仿真方案的数量和提高了仿真的效率并得到优化的仿真方案。研究结果表明，基于整合约束理论的三维可视化仿真是可以提高仿真效率并增强仿真交互性的有效方法。

关键词: 库存, 配送系统, 仿真优化, 约束理论