Model-Based Requirements Documentation - Requirements Modeling in the Functional Perspective - Data Flow Diagrams
4 important questions on Model-Based Requirements Documentation - Requirements Modeling in the Functional Perspective - Data Flow Diagrams
The modeling elementsof data flow diagrams are:
- Processes (functions necessary to transform the data).
- Data flows (data or information that is transported between processes, data stores, and sources/sinks).
- Data stores (persistent data).
- Sources/sinks (objects in the environment of the system that exchange data with the system, cannot be altered).
What is a context diagram?
What is a dataflow diagram?
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What are the characteristics of a data flow diagram?
- A commonly used type of functional models is data flow diagrams.
- Data models show data flow, data processes, data stores, sources and sinks in system environment.
- It comprises of:
- Data manipulation
- Resting Data/Data stores
- Sources and sinks in the system environment
- Data flow
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