Sankey diagram [SEP] named after
a regional or national level, and also the breakdown of cost of item or services.
Sankey diagrams put a visual emphasis on the major transfers or flows within a system. They are helpful in locating dominant contributions to an overall flow. Often, Sankey diagrams show conserved quantities within defined system boundaries.
History.
Sankey diagrams are named after Irish Captain Matthew Henry Phineas Riall Sankey, who used this type of diagram in 1898 in a classic figure (see panel on the right) showing the energy efficiency of a
, an assistant professor of history at Northeastern University, created a Sankey diagram relating majors in college to eventual careers.
Sankey diagram drawing tools.
Software tools to draw Sankey diagrams are available on the web and for a variety of computing platforms.
Notably Microsoft Visio - a common business infographics application - does not have "Sankey Diagrams templates that ship with Visio" 
See also.
- Alluvial diagram a type of Sankey diagram that uses the same kind of representation to depict how items re-group.