Sequence Diagram Example: Selection and Loops in a Combination


A sequence diagram shows object interactions arranged in time sequence. This sequence diagram template combines the use of various fragment in flow control, which includes loop, alt and opt.

Use this sequence diagram template to get started building your own. Customize the sequence diagram for your need. Click Use this Template to start.

What is Sequence Diagram?

A sequence diagram (sometimes called event diagrams or event scenarios) shows object interactions arranged in time sequence. Sequence diagrams are typically associated with realization of a use case scenario. A sequence diagram depicts the objects participated in a use case scenario and the sequence of messages exchanged between the objects (also called the flow of event in textual form) needed to carry out the functionality of the scenario.

Usages of Sequence Diagram

  • To refine use case descriptions and flow of events
  • To find additional participating objects
  • To identify responsibilities and data structure of the participating object through inspection of coming messages
  • To model the interaction between actors and subsystems when using in high level
  • elaborate a scenario in different levels of detail iteratively when needed

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