Generate Sequence Diagram from Use Case Flow of Events

A use case can be used to model a system goal/core system function. Each use case imply a sequence of steps involve in accomplishing the use case. For example, a login use case involves steps like user enters the id, user enters password, user clicks Login. The steps for accomplishing a use case can be documented with the flow of events editor by text. Moreover, you can generate sequence diagram from flow of events editor, to visualize the steps in sequence diagram. In this tutorial, we will try to document the flow of events of a use case as well as to generate sequence diagram from it.

May 3, 2011
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Start VP-UML.
Open the project Online Wine Shop.vpp attached with this tutorial. To open a project, select File > Open Project... from the main menu.
Open the use case diagram Online Wine Shop.
Right click on the use case Order Wine and select Open Use Case Details... from the popup menu.
Enter the first step Browse wine catalog. This is the first action user will do under the Order Wine use case.
Press Enter to proceed to step 2.
The system will display the catalog to user. Click on the Insert button in toolbar and select System Response from the drop down menu.
Enter Show catalog after the keyword SYSTEM.
Press Enter to proceed to step 3.
Enter step 3: Choose a wine. Enter step 4: Click [Order].
Follow what you did above to add a system response in step 5: Show payment page.
Enter step 6: Enter payment information.
Here we want to let the buyer request for a fax of order details. Click on the Insert button in toolbar and select Extension from the popup menu.
This brings you to extension pane. In step 6.a., enter Request fax.
Press Enter and enter Click [Request Fax] for step 6.a.1. Press Enter again and enter Fill in fax number for step 6.a.2.
Go back to the main flow. Enter step 7, the last step: Click [Confirm].
We have just completed the flow of events. Let's generate sequence diagram from it. Click on the Synchronize button in toolbar and select Synchronize to Sequence Diagram from the popup menu.

A sequence diagram is generated from the flow of events in a second.