Help with Sequence Diagram Assignment

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What is Sequence diagram?

Sequence Diagram is a type of interaction diagram that shows the order and interaction of different processes. We also call it as an Event scenario diagram.Making sequence diagram becomes easy if you can identify the system and the corresponding sequence of activities. It consists of vertical lines called timeline and the horizontal lines known as the messages.

There are three kind of messages that are exchanged between the objects. First one is known as the Synchronous messages. Once an object sends a synchronous message it has to wait until the other object comes back with a reply. It is represented by the solid black line. Second type of message is Asynchronous message in which both objects can work after sending a message. Last message type is the response message that is represented using the dashed lines.

The concepts mentioned above sums up the Sequence diagram, however there are few things that can make them really easy. If you can create an activity diagram with the ease, then sequence diagram isn’t a problem either.If you need any help with UML diagram assignment, our experts can help you. We provide the logic and the detailed steps as part of our UML Assignment Help.

UML Sequence diagram important elements

Sequence diagram shows the interaction of objects over a time. A sequence diagaram is divided into time (vertically) and object (horizontally) space. Creating a sequence diagram requires utilization of essential elements appropriately. Being a top online assignment writing company, we believe in providing the comphrehensive details about the concepts. Important elments of Sequence diagram that can help you create a realistic diagram are given below:

  • Actor - It is a role played by an entity in a sequence diagram. An actor is not necessarily an object, but it can be any role. The representation is done using
  • Lifeline - An individual participant in an interaction.
  • Call Message - With the help of call message, an actor can invocate the operation of a target lifeline.
  • Return Message - As the name suggests, it is the passing of the inforamtion message back to the initial lifeline.
  • Create Message - It is a particular communication between two lifelines and it represents the instantiation of the target lifeline.
  • Destroy Message -
  • Note - With the help of notes, any remarks can be added to elements of a sequence diagram.

How to create a sequence diagram?

Creating a sequence diagram requires figuring out the lifelines, objects and actors in the first place.

  • Identify the actors and place them in order of communication or invocation.
  • Identify the flow of message for the target lifelines in the horizontal space.
  • Based on the system requirements, create message, send message, return message and destroy messages are used.

Sequence diagram Example

A sample sequence diagram is given below which incorporates all the elements of a sequence diagram. You can use the below given diagram as a sample for creating your own sequence diagram.

sequence diagram example

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