关键词: 集合标志Petri网, 库存控制, 建模, 分析, 应用

Abstract: To solve inventory control of supply chain, a kind of modeling & analyzing method on Set-token Petri Net (StokPN) was proposed. Firstly set-tokens and their attribute sets were defined to describe groups of different types of physical entities and their corresponding information, which flowed through the StokPN model. To describe the operations to those set-tokens and make the model compact and normative, semantic extensions were defined including two new types of structural elements and typical operations and functions. Structural and executive rules were specified to construct a model and regulate its self-execution. AutoMod was adopted as a tool to execute and simulate StokPN models. To the question of a three-tier-four-node-multi-item (n>100) supply chain inventory system, activity time sequence was redesigned, and a comprehensive classification method with regards to the characteristics of assembly type was provided. Together with sufficient information share and the fixed periodical-emergent hybrid ordering mechanism design, an improved integrated scheme was proposed. Satisfactory solution was obtained by StokPN modeling and analysis. The result showed that the inventory level of the whole chain was notably reduced, the cycling of the inventories was effectively accelerated, and the fulfillment rate was improved.

Key words: set-token Petri net, inventory control, modeling, analysis, application