Use Case Diagram for Online Shopping Cart | UML

Use Case Diagram for Online Shopping Cart

The UML use case diagram is the behavioral diagram used to reveal the activities between the online shopping cart and its users. It depicts the graphical representation of the shopping cart’s behavioral structure.

Additionally, the diagram consists of processes (use cases) and users or “actors”. It uses defined symbols to describe the overall workflow of the shopping cart.

Project Overview

Name:Online Shopping Cart Use Case Diagram in UML
Users:Online Sellers, Web or App Admin, and the Online Customers.
Symbols Used:Actors, Container, Indication, and Use Cases
Use Case Diagram for Online Shopping Cart: Details

What is a Use Case Diagram?

The use case diagram in software engineering shows the sample adaptive behavior of the shopping software. It encapsulates the project’s functionality by incorporating use cases, actors, and their interactions.

Moreover, the diagram assists you in defining and organizing project requirements. This also provides a clear picture of the user and system relationships. Therefore, this diagram depicts the high-level functionality of a system including how the user interacts with it.

Importance of UML Use Case Diagram

To help the developers and enterprises in developing the system is the importance of the UML use case diagram. It includes the procedures from the viewpoint of users.

Furthermore, the diagram is the analysis methodology used to identify, clarify, and organize project needs.

Use Case Diagram for Online Shopping Cart with Explanation

The sample online shopping cart use case diagram includes actors, processes (use case), and their relationships.

The broken arrows are indications that the following diagrams connected to them are parts of a process. They could either be one of the indications which were the include or extend.

The “include” indication means that the following use case was compulsory to finish the task and the “extend” indication is otherwise.

Use Case Diagram of Online Shopping Cart
Use Case Diagram of Online Shopping Cart

You can add more to this deigned diagram and it is up to you how will you create your diagram. But make sure to have precise information and consider the included use cases.

Use Case Diagram for Online Shopping Cart Pdf

How to draw a Use Case Diagram?

Time needed: 5 minutes

Here’s the complete guide on how to draw a use case diagram for online shopping cart.

  • Step 1: Familiarize Use Case Diagram Symbols

    For beginners in the field of designing the diagram, you need first to familiarize the symbols to be used.

  • Step 2: Determine the targeted users

    The next step is to determine your targeted users. They will be the ones to use your project.

    You may ask the users about the typical activities done in online shopping.

  • Step 3: Analyze the use cases included

    The gathered information from the users needs to be evaluated to know the general use cases.

    From the general use cases, you will see the sub-cases that are included. But, only have the useful processes and circumstances related to the shopping cart.

  • Step 4: Plot the Use Case Diagram

    To plot the diagram you will need the users, use cases, container (scope), and their indicators (association). You will base the flow of use cases on the evaluated information from the users.

    You need to place first the users involved.

    Then place the figured use cases included in doing the process.

    After that, you will trace the association of the use cases to know the interactions between the user/s and the system.

    Finally, put the container in the plotted diagram to separate the objects’ (users and system) scope.


The use case diagram is one of the methods that contribute to the Online Shopping Cart design and development. It helps developers know the possible inputs and scenarios that the project should process and perform.

Furthermore, you will find out the needed processes and connect them to the other UML Diagrams. The diagram is also applicable in modeling the software’s use cases (processes). It also captures the system’s flow from one process to the next.


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