Data flow diagram template

What is a data flow diagram (DFD)?

Data flow diagrams (DFDs) are typically used by IT and engineering teams to show the flow of information, source of data inputs, and how that data is stored. Since 66% of knowledge workers aren’t very happy with how their team works together, these visual representations of a system are used to explain complex processes to key stakeholders or to build out new structures with your team.

Data flow diagrams visualize relationships between external entities, processes, data stores, and data flows. You can visualize data flows with both parallel and asynchronous behaviors using our data flow diagram template. This allows engineering and IT teams to collaborate better with their teams — something most workers want — and produce better results.

The data flow diagram template helps you:

• Visualize the flow of information, including data sources and storage
• Understand the relationships between different parts of the information ecosystem

What does a data flow diagram include?

A Data Flow Diagram (DFD) visually represents how data moves through a system. It typically includes:

1. Processes (circles or rounded rectangles) - Represent how data is transformed within the system.
2. Data Flows (arrows) - Show the direction of data movement between entities and processes.
3. Data Stores (open-ended rectangles) - Indicate where data is stored, like databases or files.
4. External Entities (rectangles) - Represent sources or destinations of data outside the system, such as users or external systems.

DFDs can have multiple levels, from the broad context diagram showing the entire system to more detailed Level 1, Level 2 diagrams breaking down processes further.

How to use the data flow diagram template

To use Mural’s data flow diagram template, follow the steps outlined below with your team.

Step 1: Define the data flow you want to diagram

The first stage in creating your diagram is to clearly define the data flow you’re going to focus on — this should be no longer than a phrase or one sentence.

Step 2: Create your visual key for your diagram

Next, create a key that will make your diagram immediately clear to stakeholders. Use color-coded sticky notes, shapes, or icons to visually define data, processes, and external entities.

Step 3: Visualize your data flow

Using the key, visualize your data flow by using connectors to show the relationships between each of the components of your diagram. If you have multiple data flows to map, take advantage of Mural’s infinite canvas to expand your mural to reflect all your processes.

When to use the data flow diagram template (with examples)

• System design and development: Use a DFD template when designing or developing a new system. It helps map out the flow of information, identify key processes, and understand how data is processed and transferred across different components.
• Analyzing existing systems: If you're evaluating or improving an existing system, a DFD template can help you visualize how data flows through current processes, highlighting inefficiencies or potential areas for improvement.
• Requirements gathering: When gathering system requirements from stakeholders, a DFD template provides a clear visual tool to understand their needs. It helps define how data should be handled and what external entities interact with the system.
• Troubleshooting and problem solving: If a system is facing issues (like data bottlenecks, errors), a DFD can help diagnose the root cause by tracing the flow of data and pinpointing where problems may occur.

Tips for running a data flow diagram template

To get the most out of Mural’s data flow diagram template, you should:

• Invite a diverse group of stakeholders with direct knowledge of each part of your data flow in order to avoid any blind spots.
• Use sticky notes, shapes, or even icons & images to visualize the different components of your diagram — add colors to further bring your diagram to life.
• Keep your data flow diagrams up to date by regularly returning to your template and noting any changes or issues you have identified, speeding up time to solutions.