Research Initiation: Two-Level Performance Analysis of Cellular Manufacturing Systems

该项目的目标是开发一个两级 单元制造系统的性能模型， 电池通过材料处理系统（MHS）连接， 材料和未完成的零件存储在自动 存储/检索系统（AS/RS）。 每个细胞本身就是一个 共享公共有限存储空间的工作站网络， 装载/卸载站。 这些工作站通过 材料处理股 该模型是这样的，在一个水平上，单个细胞， MHS和AS/RS分别进行分析。 （请参阅 这些组成部分之间的相互依存关系反映在 分析。） 然后，在 第二级，以定义站的聚合网络 每个代表小区、MHS或AS/RS。 这个网络是 然后根据最初的概念分解成子网络， 由首席研究员介绍。 的相互关系 在两个水平之间需要迭代数值技术 来计算不同的绩效指标。 从建模的角度来看，该模型使两个重要的 贡献：（1）它明确考虑了MHS和AS/RS， (2)它考虑了不同的调度策略，因此， 在一定程度上反映了系统的动态性。 从应用的角度来看，该模型可以用于 不同的情况下，从分析一个 单个小区到大规模网络类型的分析 制造系统

The objective of this project is to develop a two-level performance model for cellular manufacturing systems where the cells are connected via a material handling system (MHS) and raw material and unfinished parts are stored in an Automatic Storage/Retrieval System (AS/RS). Each cell by itself is a network of workstations sharing a common finite storage space and a load/unload station. These workstations are connected via a material handling unit. The model is such that in one level the individual cells, the MHS and the AS/RS are each analyzed separately. (The interdependency among these components is reflected in the analysis.) The results from this level are then utilized in a second level in order to define an aggregated network of stations each representing a cell, the MHS, or the AS/RS. This network is then decomposed into subnetworks based on a concept originally introduced by the Principal Investigator. The interrelationship between the two levels requires an iterative numerical technique in order to compute different performance measures. From a modeling perspective, the model makes two significant contributions: (1) it explicitly considers the MHS and the AS/RS, (2) it accounts for different scheduling policies and, therefore, reflects the dynamic nature of the system to some degree. From an application perspective, the model may be used in different circumstances, ranging from the analysis of an individual cell to the analysis of a large scale network type manufacturing system.