Sequence Diagram Example: Time Constraints (Hospital Bed Allocation)


A sequence diagram shows the order of the interaction between objects by using the vertical axis of the diagram to represent what and when messages are sent. Here is a sequence diagram template for hospital bed allocation. It shows how time constraints can be modeled.

This simple sequence diagram example and template can be edited with Visual Paradigm Online, an online diagramming software. Click Use this Template to edit this sequence diagram template, or click Create Blank to create a new one.

What is Sequence Diagram?

Sequence diagrams are a type of interaction diagram which focus on the interaction of a scenario of a given task as observed over time. A sequence diagram is a collection of objects interacting to accomplish a given task. Objects appear across the top of the diagram. A dashed line extends from the object to the bottom of the sequence diagram. Time is represented the messages exchanged between the participating objects from the top to the bottom along the vertical axis in the diagram.

Which behavior diagram should you choose?

  1. You should use sequence diagrams when you want to look at the behavior of several objects within a single use case.
  2. If you want to look at the behavior of a single object across many use cases, use a state diagram.
  3. If you want to look at behavior across many use cases or many threads, consider an activity diagram.

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