Sankey charts, also known as flowcharts or network diagrams, are a powerful tool for visualizing data flow in a clear, intuitive manner. They are particularly useful in illustrating complex systems, processes, and relationships, making it easier to understand data circulation and identify any bottlenecks or inefficiencies. In this article, we’ll delve into the fascinating world of Sankey charts, exploring their creation and various applications.

What are Sankey Charts?

A Sankey diagram, named after the British engineer, William Sankey, is a specific type of flowchart that is composed of a succession of interconnected links or “sashes” denoting the flow of a substance or information. The unique shape, with arrows curving inwards, allows for a concise and space-efficient representation of quantitative relationships. This makes them particularly effective when comparing quantities between different components or stages.

Creating a Sankey Chart: The Basics

1. Defining the Data: Start by identifying the key elements in your data flow, such as sources, sinks, and intermediate steps. For a process or system, this could be individual tasks, phases, or departments. Each of these is represented as a node in your Sankey chart.

2. Measuring Quantities: Each flow from one node to another should have a specified quantity associated with it. This could be volume, weight, or flow rates depending on the nature of the data.

3. Layout: Arrange the nodes in a way that reflects the logical flow. Make sure to place the sources at the beginning, sinks at the end, and intermediate steps accordingly.

4. Draw the Links (Sashes): Using connecting lines or “sashes,” represent the amount of flow between each node. The thickness or color of the sashes can indicate the strength or priority of the flow.

5. Label and Title: Clearly label each node, link, and axis with the information and units to provide context.

6. Annotate and Add Features: Consider adding annotations, color-coding, or labels to highlight key aspects such as bottlenecks, performance indicators, or specific processes.

Sankey Charts in Action: Real-world Applications

1. Industrial Processes: Sankey charts are commonly used in manufacturing and logistics to map the flow of raw materials, products, and waste across various stages in a production line.

2. Energy Networks: Graphically represent the distribution and consumption of electricity, natural gas, or renewable energy in a grid.

3. Supply Chain Analysis: They effectively show the flow of goods or services from procurement to distribution, highlighting any possible disruptions or inefficient flows.

4. Transportation Systems: Sankeys can depict the route, volume, and mode of transportation for goods or passengers, helping to identify areas for improvement.

5. Data Storage and Transfer: In data management, Sankey charts can visualize the movement of data from different sources to destinations and highlight the efficiency of different storage methods.

6. Policy and Management: Environmental reports and policy documents may use Sankey charts to illustrate the flow of resources and the impact of climate change or resource depletion.

7. Education and Research: In scientific research and education, Sankey charts help to visualize complex systems like ecological networks or flow of information in a research experiment.

Concluding Thoughts

Sankey charts are a versatile visualization tool that simplifies the representation of data flow, making complex systems more accessible. Whether analyzing industrial processes, managing data, or understanding resource distribution, these charts provide a compelling way to visualize and communicate data in a visual, meaningful way. As data becomes increasingly abundant, Sankey charts will likely continue to play a critical role in helping us make sense of the world around us.

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.