Sankey charts have become a popular tool for visualizing complex data flows and material balances in a wide range of industries, from energy and manufacturing to transportation and finance. In this article, we’ll explore what Sankey charts are, how to create them, and some of their key applications.
What are Sankey Charts?
Sankey diagrams, named after the Scottish engineer Thomas Sankey who pioneered their use in the 1800s, are a type of flow chart that visually represents the movement of material, energy, or resources through a system. Each segment of the diagram, called a “link,” represents a particular flow, and the width of the link indicates the magnitude of that flow. This makes Sankey charts especially useful for illustrating how a system works, the efficiency of different stages, and the allocation of resources.
Key Features of Sankey Charts
Visual representation of flows
Sankey diagrams are designed to make the flow of materials, energy, or resources easily visible. This visual representation makes it easier for stakeholders to understand the entire system, including where materials or resources are lost, transformed, or conserved.
Comparison of flows
By allocating different color schemes or patterns to different flows, Sankey charts can compare the relative sizes and sources of various flows, highlighting important trends or issues.
Transparency in complex systems
Complex systems with numerous inputs, outputs, and processes can be simplified using Sankey diagrams, making it easier to identify inefficiencies, optimize processes, and communicate with stakeholders.
How to Create Sankey Charts
Creating effective Sankey charts involves several components, including:
Data analysis
Gather and analyze data to determine the inputs, outputs, and flows in your system.
Choosing tools
Tools like Microsoft Excel, Tableau, Python (with libraries like pySankey), or specialized software like OriginLab or SmartDraw can help you create Sankey diagrams.
Designing the chart
Consider the layout, color scheme, and the use of patterns or arrows to depict flows clearly.
Testing and iterating
Review the chart for clarity, adjust the design and labeling as needed, and seek feedback from others to ensure the chart effectively communicates the intended information.
Applications of Sankey Charts
Energy systems
Sankey charts are crucial in visualizing energy flow in power grids, renewable energy sources, nuclear power plants, and hydroelectric systems. They highlight energy production, consumption, transmission, and losses, aiding in energy efficiency improvements and sustainable planning.
Manufacturing and supply chains
For industries with complex supply chains, Sankey charts can track material inputs, processing stages, and outputs. This helps in identifying bottlenecks, waste, and potential improvements in efficiency and sustainability.
Environmental studies
Visualizing water cycles, pollution flows, and carbon emissions can assist in understanding environmental impacts and guiding policies to reduce pollution and waste.
Financial flows
Sankey diagrams can illustrate financial transactions, investments, and the movement of funds across organizations, sectors, or regions, providing insights into economic relationships and opportunities for analysis.
Conclusion
Sankey charts are a powerful tool for visualizing the flow of materials, energy, or resources through a system, making complex data more accessible and understandable. Whether you’re optimizing energy systems, managing supply chains, or analyzing environmental impacts, the ability to create and interpret Sankey diagrams can provide valuable insights and guide decision-making processes. By mastering the creation and application of Sankey charts, you can unlock new perspectives and drive improvements across various industries and sectors.
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.
