Activity Diagram for Point of Sale System

Activity diagram for point of sale is a designed illustration that shows the system’s behavioral aspect. It shows the POS (Point of Sale) system behavior in terms of responding to its users.

POS (Point of Sale) System UML Activity Diagram also gives the programmers bright ideas and guides them throughout the project development.

The users that are essential in creating an activity diagram for POS (Point of Sale) System were the Company Owner or Admin and their Employees (Sales Attendant) and the Customer.

By determining the users of the system, it would be much easier for you to build its interactions and activities. Then you will be able to foresee the behavior of the system towards its user based on actual POS (Point of Sale) activities.

Activity Diagram Symbols

Now before we create the Activity diagram of the POS (Point of Sale) System, you must know first the symbols used to make it. And here are the symbols used in Activity Diagram.

Activity Diagram Symbols
Activity Diagram Symbols

You must be familiar with these symbols in order for you to distinguish what should you put in the illustration to avoid misunderstandings.

This is also to educate you about the activity diagram symbols so you and the users would understand the system’s behavior.

In addition to that, being familiar with these activity diagram symbols will help you show the detailed parts and interactions that should happen when you develop the System.

Then this thought enables you to have right ideas on how you would develop the system that you want.

Additional Knowledge

The activity diagram works perfectly with the other UML Diagrams which were available also on our site. They are the POS (Point of Sale) System Use Case Diagram, Data Flow Diagram, Entity Relationship Diagram, Class Diagram, Sequence Diagram and many more. These diagrams served as the blueprint designs to foresee the needed functions of a working POS (Point of Sale) System.

UML Activity Diagram of POS (Point of Sale) System

Time needed: 5 minutes.

The given Activity Diagram for POS (Point of Sale) System is here. It shows how would the system interact with the Admin, Sales Attendant and the Customer in respective scenarios. The interactions given here are based from the activities that usually happened in an POS (Point of Sale).

  1. Activity Diagram for Point of Sale System (Admin Side)

    Here’s the Activity Diagram designed for the Admin or Owner’s side. It shows the system’s interaction when the admin uses the software. The activities shown here were all based on the actual activities when doing POS (Point of Sale).
    Activity Diagrams for POS (Point of Sale) System - Admin Side
    This diagram describes the series of events when the admin or owner uses the project. Its’ activities starts with validating the admins’ information to make sure that the user was the main admin or the owner.

    Then the system will show the overall activities which is only accessible by the Admin. That is the reason why the Activity Diagrams were separated for the employee’s side and for the admin side.

  2. POS Activity Diagram – Customer and Sales Side

    This illustration shows the activity diagram interaction with multiple users. You also have to design your software’s interaction with more than one user. Make sure that your system design has a strict security that separates other users from the Admin.
    Activity Diagrams for POS (Point of Sale) System - Customer and Sales Side
    This illustration shows you further activities and software multitasking ability. It renders the customer request as well as accommodating their purchasing transaction.

    These Activity diagrams were made to show the system’s ability to secure all the needed data for checking, monitoring and other matters that is involved in POS (Point of Sale) System.

You should be informed that the diagram can be modified to achieve your desired system behavior. You can also create your unique system function to justify all of your clients needs. And if you want, you can copy all the ideas presented here so you won’t need to create a new one.

You may also merge this illustration with other diagrams if you want to make your activity diagram general. But you just have to make sure that the specificity is still there so your readers and system users understands the behavior of POS (Point of Sale) system development.

What is a POS (Point of Sale) System Activity Diagram?

To have a clear understanding about it, let me tell you its purpose and role. The POS (Point of Sale) System must have an activity diagram so that the programmers would have a basis on how should the software approach its users.

It is because, the activity diagram guides the programmer in creating the software and its’ must-have behavior. So if you want a friendly and effective or easy-to-use POS (Point of Sale) System, then you must also complete the UML activity diagram.

Through the activity diagram, you’ll be able to illustrate the flow of activities and know what should be the interactions between the POS (Point of Sale) System and its users.

Your readers and users will also be guided about how would they use the system by looking into its activity diagram. So its best for you to explain your thoughts on how would the POS (Point of Sale) System behave through UML activity diagram.


It is essential for you to know the diagrams used to design and develop the POS (Point of Sale) System. That is because you cannot perfectly create a fully-functional system without it.

But if you create this activity diagram, you will know the possible inputs and scenarios that the system should process and perform. Not only that, you will find out the needed processes and connect them to the other UML Diagrams.

By completing the Activity Diagrams per module or per processes, you will easily achieve your desired system.

Check out our Related and Recommended Articles for more Learnings and Information.


Now, what have you learned through our discussion? Have you determine the Diagrams that you must create? What project do you have in mind?

And if you have ideas or concerns with our discussion, do not hesitate to leave us your suggestions and questions. Those are highly appreciated. Thank you so much and have a good day!

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