Difference Between Data Flow Diagram And Flow Chart
When it comes to understanding the flow of information and processes in a system, two commonly used tools are the Data Flow Diagram (DFD) and Flow Chart. While both tools serve similar purposes, they have distinct differences that set them apart. In this article, we will explain these differences and help you determine which tool is best suited for your needs.
What is a Data Flow Diagram?
A Data Flow Diagram is a graphical representation of the flow of data through a system. It is used to model, analyze and document the flow of data in a system. The diagram consists of four components: processes, data stores, data flows, and external entities. Processes represent the operations or activities that transform data, while data stores are used to show where data is stored. Data flows represent the movement of data between processes, data stores, and external entities. External entities are the sources or destinations of data outside the system being modeled.
What is a Flow Chart?
A Flow Chart is a graphical representation of a process or algorithm. It is used to describe the steps involved in a process, from start to finish. The chart consists of various symbols that represent the different steps in the process. These symbols include rectangles, diamonds, ovals, and arrows. Rectangles represent process steps, diamonds represent decisions, ovals represent the start or end of a process, and arrows represent the flow of the process.
Differences Between Data Flow Diagram and Flow Chart
While both Data Flow Diagram and Flow Chart are graphical representations of a system or process, there are several differences between them. These differences include:
Purpose
The primary purpose of a Data Flow Diagram is to model the flow of data through a system, while the primary purpose of a Flow Chart is to describe the steps involved in a process or algorithm.
Components
Data Flow Diagrams consist of four components: processes, data stores, data flows, and external entities. Flow Charts consist of various symbols that represent the different steps in the process, such as rectangles, diamonds, ovals, and arrows.
Level of Detail
Data Flow Diagrams are typically used to provide a high-level overview of the flow of data through a system. They do not provide detailed information about the individual steps involved in a process. Flow Charts, on the other hand, can be used to provide both a high-level overview of a process, as well as detailed information about individual steps.
Focus
Data Flow Diagrams focus on the flow of data through a system, while Flow Charts focus on the steps involved in a process. This means that Data Flow Diagrams are more suited for systems where the flow of data is critical, while Flow Charts are more suited for processes where the individual steps are important.
When to Use Data Flow Diagrams
Data Flow Diagrams are best suited for systems where the flow of data is critical. They can be used to model the flow of data through a system, identify potential bottlenecks, and optimize the flow of data. Data Flow Diagrams are also useful for identifying the sources of data and the destinations of data in a system.
When to Use Flow Charts
Flow Charts are best suited for processes where the individual steps are important. They can be used to describe the steps involved in a process, identify potential issues or bottlenecks, and optimize the process. Flow Charts are also useful for training purposes, as they provide a clear and concise overview of the process.
Conclusion
Both Data Flow Diagram and Flow Chart are useful tools for understanding the flow of information and processes in a system. While they have distinct differences, they can be used together to provide a comprehensive understanding of a system or process. By understanding the purpose, components, level of detail, and focus of each tool, you can determine which one is best suited for your needs.