Sankey charts, also known as precedence diagrams, are a type of flowchart that help to visualize and analyze the flow of materials, energy, or information through a process. They were originally developed by Helmut Sankey in the 1930s as a way to show the relative proportions of different inputs and outputs in a process.

How to Create Sankey Charts

To create a Sankey chart, you need to follow these steps:

1. Determine the different inputs and outputs of the process that you want to visualize.
2. Place the inputs at the top of the chart and the outputs at the bottom.
3. Connect the inputs to the outputs using arrows, with the arrowheads indicating the direction of the flow.
4. Use weights or colors to represent the relative proportions of the different inputs and outputs.

Sankey charts can be created using a variety of tools, including spreadsheet programs, diagramming software, and online visualization tools. Some popular tools for creating Sankey charts include Microsoft Excel, Lucidchart, and Gliffy.

Applications of Sankey Charts

Sankey charts are a powerful tool for process optimization and improvement. They can be used to:

1. Identify bottlenecks and areas for improvement in a process.
2. Determine the relative importance of different inputs and outputs in a process.
3. Visualize and analyze the flow of materials, energy, or information through a process.
4. Compare different processes to identify areas for improvement.
5. Monitor and measure the performance of a process over time.

In summary, Sankey charts are a versatile and powerful tool for visualizing and analyzing the flow of materials, energy, or information through a process. By using Sankey charts, you can identify bottlenecks and areas for improvement, prioritize resources, and monitor and measure the performance of your processes. Whether you are a process engineer, a manager, or an analyst, Sankey charts can help you to create more efficient and effective processes.

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