Sankey charts are a type of flow diagram that visualize complex systems by depicting the data in the form of a network of linked nodes. Each node represents a point of data generation or consumption, and the links or branches between the nodes represent the flow of data or resources. The width of each link or branch is proportional to the amount of data or resources being transferred at that point.

The name, “Sankey,” comes from the Scottish engineer, Captain Matthew B. Sankey, who developed this type of diagram in the late 19th century to show the flow of energy from steam boilers to engines on the ship. Since then, Sankey charts have been used in various fields and industries to represent a wide range of flows and processes, such as energy consumption, financial transactions, material flows in manufacturing, traffic flows, and more.

Creating a Sankey chart can seem complex, but with the help of modern visualization tools, it can be a straightforward process. Here’s a step-by-step guide on how to create a Sankey chart:

Step 1: Define your data
To create a Sankey chart, you need data that includes the following information:

• Source: The starting point of the flow or resource

• Target: The ending point of the flow or resource

• Data value: The amount of flow or resource transferred

• Labels: Names or categories for the source and target nodes

• Flow names: Names for the links between the nodes

Once you have your data organized, you need to prepare it in a format that can be easily analyzed by your visualization tool.

Step 2: Choose a tool
There are various tools that can help you create Sankey charts, such as Tableau, Microsoft PowerBI, and Kibana. Each tool has its own strengths, but they all follow a similar process:

• Import your data

• Design your chart using drag-and-drop functionality

• Customize the appearance of your chart

• Save or export your chart

Choose the tool that best fits your needs, skills, and budget. Some tools require a learning curve, while others offer limited customization options.

Step 3: Design your chart
The design process of a Sankey chart involves arranging the nodes and branches in a visually appealing and informative way. Common design considerations include:

• Hierarchy: Position the nodes in a way that shows their hierarchical relationships

• Direction and orientation: Choose a direction for the flow and consider the layout that makes the most sense for your data

• Color and width: Use contrasting colors and widths to differentiate between the flows and highlight important data points

• Labels: Include clear and concise labels for the nodes and flows

• Accessibility: Ensure that the chart is easy to read and understand for people with visual or cognitive impairments

Step 4: Test and refine your chart
Once your chart is designed, test it for readability and accuracy. Check for common issues such as overlapping branches or missing data points. Refine your chart until it meets your standards and effectively communicates your message.

Applications of Sankey charts
Sankey charts are widely used as a powerful tool for understanding complex systems with a high degree of interconnectedness. Here are some common applications:

• Energy consumption: Visualize the flow of energy in a power grid or building.

• Supply chain management: Show the movement of goods and materials from suppliers to customers.

• Budgeting: Display the allocation of funds within different departments or organizations.

• Resource management: Highlight the sources and uses of water, air, or other natural resources in a region.

• Traffic analysis: Analyze the flow of traffic in different modes, such as cars, buses, or pedestrians, within a city or region.

• Material flows: Track the production, use, and disposal of materials in a manufacturing process.

In conclusion, Sankey charts provide a clear and intuitive way to visualize complex systems and flows of data or resources. By following the steps outlined in this article, anyone can create an informative and visually appealing Sankey chart using modern visualization tools. Whether you’re working in energy, manufacturing, finance, or any other field, Sankey charts can help you gain insights into your data and make better decisions.

SankeyMaster

SankeyMaster is your go-to tool for creating complex Sankey charts . Easily enter data and create Sankey charts that accurately reveal intricate data relationships.