Sankey charts, also known as network diagrams or flowcharts, are a type of chart used to visually represent the flow of data in a system. They are particularly useful for understanding complex data flows and demonstrate how data flows from one part of a network to another.
Sankey charts can be created using a variety of software tools, including Microsoft Word, Microsoft Excel, and D3.js. However, in this article, we will focus on how to create a basic sankey chart in Microsoft Excel and briefly discuss their applications.
The basic structure of a sankey chart consists of two parallel lines that represent the input and output connections within the network. Each line has a unique color and weight, which indicates the flow rate or volume of data. The input and output connections are shaded in dark colors, while the rest of the network is typically represented in light colors.
To create a sankey chart, follow these steps:
1. Open Microsoft Excel and create a new workbook.
2. In the toolbar, select “Insert” and then “Line” to add a new line that represents the input and output connections.
3. Choose the appropriate colors for your line and set the weight of each line by dragging the slider and then adding it to your line.
4. To add data to your sankey chart, click on the desired cell and enter the relevant data. You can use data inputs for the input lines and data outputs for the output lines.
5. You can also include additional lines that represent the data flow in a network connection by using a “new line” button and choosing the appropriate options.
6. Once you have added all the necessary data, the sankey chart should be complete.
Applications of Sankey Charts
Sankey charts can be used to visualize and understand a variety of complex data flows. Some of the most common applications include:

1. Analyzing supply chain processes.

2. Understanding production processes and flow of materials, components, or finished products.

3. Visualizing the flow of data through different systems or applications.

4. Determining the optimal route for goods, information, and services.

5. Identifying bottlenecks and areas where efficiency can be improved.

6. Modeling complex financial systems and visualizing the impact of different economic decisions.

Conclusion
Sankey charts are a powerful tool for visualizing complex data flows in a network. By using a Sankey chart, you can quickly and easily grasp the overall relationships between the data flow in a system and identify areas that need improvement. With the vast array of data, it is essential to use the best technology to represent and understand it effectively, and Sankey charts provide a visually intuitive way of doing so.

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