- Sequence diagrams model the dynamic aspects of a software system.
- The emphasis is on the “sequence” of messages rather than the relationship between objects.
- A sequence diagram maps the flow of logic or flow of control within a usage scenario into a visual diagram enabling the software architect to both documents and validates the logic during the analysis and design stages.
- Sequence diagrams provide more detail. And show the message exchanged among a set of objects over time.
- Moreover, Sequence Models are good for showing the behavior sequences seen by users of a diagram shows only the sequence of messages, not their exact timing.
- Sequence diagrams can show concurrent signals.
Purpose of Sequence Models
- The main purpose of this diagram is to represent how different business objects interact.
- A sequence diagram shows object interactions arranged in time sequence.
- It depicts the objects and classes involved in the scenario and the sequence of messages exchanged between the objects needed to carry out the functionality of the scenario.
When to use Sequence Diagram
- A Sequence Models can be a helpful modeling tool when the dynamic behavior of objects needs to be observed in a particular use case or when there is a need for visualizing the “big picture of message flow”. A company’s technical staff could utilize sequence diagrams in order to document the behavior of a future system.
- It is during the design period that developers. And architects utilize the diagram to showcase the system’s object interactions. Thereby putting out a more fleshed out overall system design.