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摘要: 为了降低第三方物流信息系统运输子系统设计的复杂性, 在系统结构设计中, 将运输子系统分为业务系统、监控、查询与统计、财务接口与运费调整的审核5个部分; 在业务流程设计中, 用Petri网对大部分业务逻辑加以描述, 以优化运输子系统; 在数据库设计中, 从单据中识别实体, 根据界面绘制数据流图, 从E-R图中识别实体之间的关系, 将其转化为关系模型, 成为数据库中表的基本结构, 提出以“族”的概念组织实体集和数据库表, 将根据物理数据模型建立的125张表分成了14个族。此结构设计方法简化了第三方物流信息系统运输子系统的结构, 提高了工程质量。Abstract: In order to reduce the complexity of the transportation subsystem design of third-party logistics information system in the system structure design, the transportation subsystem was divided into five parts, such as business system, monitor, query and statistic, finance interface and transportation fee adjustment; in the business flow design, Petri net was adopted to describe most business logics in order to optimize the transportation subsystem; in the database design, entities were identified from documents, data flow diagrams were drawn up based on interfaces, the relationships among entities(E-R) were identified from E-R diagrams, E-R were converted into relationship models and became the basic structures of tables in the database, and the method to organize entity sets and database tables in terms of the concept "family" was proposed, 125 pieces of tables established according to physical data model were divided into 14 families.These design methods can simplify the transportation subsystem structure design and improve project quality.
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图 2 运输子系统业务流程着色Petri网
Figure 2. Operation flow colored Petri net of transportation subsystem
图 3 运输子系统返单Petri网
Figure 3. Customer order returned Petri net of transportation subsystem
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