Sequence Diagram Example: Book a Seat


A sequence diagram is a visual model describing how groups of objects collaborate in some behavior over time. This sequence diagram example shows the interactions involved in booking a seat. It consists of an actor User, and several objects for interface, controller, routes and route. It's a typical MVC sequence diagram - routes and route are model (M), interface is view (V) and mainController is controller (C).

To edit this sequence diagram template, simply click on Use this Template, then adjust the sequence diagram to your liking. Alternatively, click Create Blank to draw your sequence diagram from scratch.

What is Sequence Diagram?

Sequence diagrams, a kind of Interaction diagrams that capture the interaction between objects in the context of a collaboration. A sequence diagram shows the order of the interaction visually by using the vertical axis of the diagram to represent time what messages are sent and when. It is typically used to model a single scenario of a use case of a system.

How to draw Sequence Diagram

  1. Identify who starts the interactions (which actor)
  2. Describe the message exchange between actors and the business systems in textual form called flow of events
  3. Consider each of the flows in the flow of events repeatedly to identify the participating objects which are required to get the task done.
  4. Detail the message exchange between the participating object
  5. Consider the creation and deletion of object lifeline as well
  6. Review and touch up by running through the entire scenario

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