关键词: 网格存储, PBS, 分区设计, 排队网络, ABC分类

Abstract: The grid-based compact storage system can store goods intensively; it can maintain a fine accessibility of goods while achieving high space utilization. The existing researches on this problem focus on basic issues such as the algorithm design for minimizing the retrieval time, but how to make better use of these research’s outcomes to improve the design of the system has not been unfolded yet. This paper employs the existing algorithm research results to analyze the performance of the different layouts of the grid compact storage system. We design an open queuing network consisting of two parts: a storage zoning subsystem based on the retrieval time, and an ABC classification subsystem based on the frequency of demand for goods in each zone, respectively. Take 10×10 grid as an example, computational experiments show that compared with random storage allocation rules, the expected retrieval time achieved by zoning a grid-based storage system can be reduced by 53.8%; on this basis ABC classification can further improve the system performance by up to 46.5%, and can also greatly reduce the waiting time due to queuing.

Key words: grid storage, PBS, zoning design, queuing network, ABC classification