Difference between Sequence diagram and Collaboration diagram

A Sequence diagram is an interaction diagram that details about the operation that is carried out. Sequence diagram captures the interaction between the objects in the context of collaboration. Sequence diagrams are time focused and they show the order of the interaction visually by using the vertical axis of the diagram to represent time.

Example:

Collaboration Diagram represents the interaction of the objects to perform the behavior of a particular use case or a part of use case. The designers use the Sequence diagram and Collaboration Diagrams to define and clarify the roles of the objects that perform a particular flow of events of a use case.

Example:

Similarities Between Sequence and Collaboration Diagram

  1. In Unified Modelling Language both the sequence diagram and collaboration diagram are used as interaction diagrams.
  2. Both the diagrams details about the behavioral aspects of the system.

Differences Between Sequence and Collaboration diagram:

Sequence Diagrams Collaboration Diagrams
The sequence diagram represents the UML, which is used to visualize the sequence of calls in a system that is used to perform a specific functionality. The collaboration diagram also comes under the UML representation which is used to visualize the organization of the objects and their interaction.
The sequence diagram are used to represent the sequence of messages that are flowing from one object to another. The collaboration diagram are used to represent the structural organization of the system and the messages that are sent and received.
The sequence diagram is used when time sequence is main focus. The collaboration dagram is used when object organization is main focus.
The sequence diagrams are better suited of analysis activities. The collaboration diagrams are better suited for depicting simpler interactions of the smaller number of objects.


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