data flow diagram 数据流图 数据流图实例 作者其他创作 大纲/内容 个人信息 DFD-数据流图实例 激活通知 拒绝函 顶层数据流图 查询/修改个人信息请求 信用卡申请信息 P0CCMS 信用卡申请验证结果 P4CCMS [说明]现准备为某银行开发一个信用卡管理系统CCMS,该系统的基本功能为:1.信用卡申请。非信用卡客户填写信用...
A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modelling its process aspects. A DFD is often used as a preliminary step to create an overview of the system, which can later be elaborated. DFDs can also be used for the visuali...
1.1DFD 定义 DFD, Data Flow Diagram. 它表示系统如何处理数据并描述数据的来源、去向以及数据的存储方式 如图: 1.2 DFD的组成 Process– Transforms incoming data flow into the outgoing data flow 输入数据流转化为输出数据流 Data Store– Represents the repositories of data in the system数据存储库 Data Flo...
data flow diagram 数据流图(Data Flow Diagram,简称DFD)是一种用于表示数据处理过程的工具。它由一组节点和连接这些节点的箭头组成,描述了数据在系统中的流动方式。每个节点代表一个处理步骤,而箭头则表示数据的流动方向。DFD可以帮助我们更好地理解系统的功能和结构,从而为设计和实现提供指导。 作者其他创作 大纲/内...
6. Output from processes can be an input data to other process, modified data such as change of status and change of content. D) Data Flow Diagram Types 1. Physical Data Flow Diagram: Physical data flow diagrams are implementation-dependent and show the actual devices, ...
UML Sequence Diagram Process Flowchart The main reason of using Process Flowchart or PFD is to show relations between major parts of the system. Process Flowcharts are used in process engineering and chemical industry where there is a requirement of depicting relationships between major components only...
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One way to achieve this is to restrict the number of processes in a data-flow diagram. Right Complexity for Human Mind - 7 + / - 2 Symbols On lower-level data-flow diagrams with multiple processes, one should not have more than nine process symbols. Another way to avoid crossing lines ...
Data Flow Diagrams The process model is a core diagram in structured analysis and design. Also called a data flow diagram (DFD), it shows the flow of information through a system. Each process transforms inputs into outputs. Flow lines represent data flowing between nodes including processes, ...
ConceptDraw is Professional business process mapping software for making process flow diagram, workflow diagram, general flowcharts and technical illustrations for business documents. It is includes rich examples, templates, process flowchart symbols. Co