Rules for Data Flow Diagram (DFD)
Following are the rules of DFD:
- Data can flow from:
- Terminator or External Entity to Process
- Process to Terminator or External Entity
- Process to Data Store
- Data Store to Process
- Process to Process
- Data Cannot Flow From
- Terminator or External Entity to Terminator or External Entity
- Terminator or External Entity to Data Store
- Data Store to Terminator or External Entity
- Data Store to Data Store
What is DFD(Data Flow Diagram)?
Data Flow Diagram (DFD) represents the flow of data within information systems. Data Flow Diagrams (DFD) provide a graphical representation of the data flow of a system that can be understood by both technical and non-technical users. The models enable software engineers, customers, and users to work together effectively during the analysis and specification of requirements.
Table of Content
- What is Data Flow Diagram (DFD)?
- Characteristics of Data Flow Diagram (DFD)
- Physical and Logical data flow diagrams (DFDs)
- Components of Data Flow Diagrams (DFD)
- Levels of Data Flow Diagram (DFD)
- Rules for Data Flow Diagram (DFD)
- Advantages of Data Flow Diagram (DFD)
- Disadvantages of Data Flow Diagram (DFD)
- How to Draw Data Flow Diagram?
- Conclusion
- Frequently Asked Questions (FAQs) related to Data Flow Diagram (DFD)