- 123
A Data Flow Diagram (DFD) is a graphical representation of the flow of data within a system. It illustrates how data enters and exits the system, what changes the data undergoes, and where the data is stored. DFDs are useful for both technical and non-technical stakeholders to understand the system's processes and data flow12.
Components of Data Flow Diagrams
DFDs consist of four main components:
Process: Represents the transformation of input data to output data. It is usually depicted as a circle or a rounded rectangle.
Data Flow: Shows the direction of data movement between processes, data stores, and external entities. It is represented by arrows.
Data Store: Indicates where data is stored within the system. It is depicted as two parallel lines.
External Entity: Represents sources or destinations of data outside the system. It is shown as a rectangle13.
Levels of Data Flow Diagrams
DFDs can be divided into different levels to represent varying degrees of detail:
什么是数据流图 Data Flow Diagram (DFD) - CSDN博客
- 什么是数据流图（DFD）？如何绘制DFD？
- 一张图片胜过千言万语。数据流图（DFD）是系统内信息流的传统视觉表示。一个整齐而清晰的DFD可以用图形描绘出大量的系统需求。它可以是手动的，自动的或两者 …
- 它显示了信息如何进入和离开系统，什么改变了信息以及信息的存储位 … 展开
- 在本教程中，我们将向您展示如何绘制上下文图，以及一级图。
- 注意：我们在这里使用的软件是
- Visual Paradigm
- Visual Paradigm的 展开
- 我们将不再从头创建另一个图表，而是分解系统进程以形成一个新的DFD。右键 …
- 连接到所选进程（系统）的数据存储和/或外部实体将在1级DFD中被引用。因此…
- 注意：新的DFD看起来应该与上下文图非常相似。每个元素都应该 … 展开
What is DFD (Data Flow Diagram)? - GeeksforGeeks
- Components of DFD. The Data Flow Diagram has 4 components: Process. Input to output …
- Rules for creating DFD. The name of the entity should be easy and understandable without …
- Levels of DFD. DFD uses hierarchy to maintain transparency thus multilevel DFD’s can be …
- Advantages of DFD. It helps us to understand the functioning and the limits of a system. It is …
- Disadvantages of DFD. At times DFD can confuse the programmers regarding the system. …
What is a Data Flow Diagram - Lucidchart
A data flow diagram (DFD) maps out the flow of information for any process or system. It uses defined symbols like rectangles, circles and arrows, plus short text labels, to show data inputs, …
What is a data flow diagram (DFD)? - IBM
2024年11月22日 · A data flow diagram (DFD) is a visual representation of the flow of data through an information system or business process. DFDs make complex systems easier to understand and are a popular resource for …
What is a Data Flow Diagram? Examples, Symbols, and Use Cases
Learn what a data flow diagram is in our ultimate guide — including examples, benefits, common symbols, and why you might what to create one in Miro.
Data-flow diagram - Wikipedia
A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of …
- 其他用户还问了以下问题
“数据流图”是什么，5分钟带你详细了解？ - 知乎专栏
数据流程图（Data Flow Diagram，DFD/Data Flow Chart），简称 数据流图 ，是一种描述系统数据流程的主要工具，它用一组符号来描述整个系统中信息的全貌，综合地反映出信息在系统中的流动、处理和存储情况。
绘制数据流图指南-CSDN博客
2010年1月6日 · 数据流图（Data Flow Diagram，简称DFD）是面向数据流进行建模的一种图形化工具，它通过图形方式表达系统的逻辑功能、数据在系统内部的逻辑流向和逻辑变换过程。
Data Flow Diagram: Examples (Context & Level 1
A data flow diagram (DFD) represents graphically a flow of data within a system. It illustrates how data is input and output from the system. It also shows destinations, storage, and sources of the information in the system.
Data-flow diagrams (DFDs) model a perspective of the system that is most readily understood by users – the flow of information through the system and the activities that process this …
- 某些结果已被删除
