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Nowadays, flow chart is an important productivity tool, serving employees in various industries and functions.

In the year 1949, flowchart began to be used for planning computer programs and quickly became one of the most popular tools in designing computer algorithms and programs. Participants from this conference such as Art Spinanger and Ben Grahamthen began to use flowchart in their respective fields, which helped propagate the usage of flowchart. Mogensen, an industrial engineer trained some participants in his Work Simplification Conferences in New York. In 1921, the couple presented the graphic-based method in a presentation titled: “Process Charts: First Steps in Finding the One Best Way to do Work”, to members of the American Society of Mechanical Engineers (ASME).Īfter that, in 1930s, Allan H. If the relationship between the diagram elements is one-to-one, then simply leave it blank.It is not clear who was the true inventor of flowcharts, but the first standardized documentation on flow chart was first introduced by Frank and Lillian Gilbreth. It’s optional, but sometimes useful to add the standard UML notation for multiplicity: 1, 1.n, or *.

You can also show inheritance on both actions and actors with the standard UML notation of a connector with an open arrowhead. In my example, you can Mark a habit as done, or Mark a habit as done AND add a comment in the same action.

When one action is an extension of another action (or a more specific version of that action), use extend to show that relationship.

So, the Update the habit history action is dependent on the other actions. But you wouldn’t update the habit history without one of the four actions: Add a habit, Delete a habit, Mark a habit as done or Add a comment. For example when you Add a comment in the habit tracker app, you must Update the habit history.

When one action is dependent on another action, use an include relationship.

You can show specific relationships between the actions (or classes and methods) with include and extend. Use case diagrams can show information that makes it easier to program