Use Case Diagram for the Amazon Online Shopping System

Let’s build the use case diagram of the Amazon problem and understand the relationship between its different components. First, we’ll define the different elements of Amazon, followed by the complete use case diagram of the system.

System

Our system is the Amazon shopping system.

Actors

Now, we’ll define the main actors of Amazon.

Primary actors

• Authenticated user: This actor can search for products, place or cancel orders, and add new products to sell.

• Guest: The guest actor can search for products, add items to a shopping cart, and update it. However, it must become a registered/authenticated member to place an order.

Secondary actors

• Admin: This can add, modify, or delete existing product categories.

• System: This is responsible for sending out notifications for orders and shipping updates.

Use cases

In this section, we will define the use cases for Amazon. We have listed the use cases according to their respective interactions with a particular actor.

Note: Some use cases will occur multiple times because they are shared among different actors in the system.

Admin

• Block account: To block an account

• Add/Modify/Delete product category: To add, modify, or delete product categories

Authenticated user

• Add/Modify/Delete product: To add a new product or modify the details of any existing product that a customer themselves added for selling. A user can also delete a product that they added for selling

• Search product: To search for any particular product based on the given criteria (name or category)

• Add item to shopping cart: To add an item to a shopping cart

• Update shopping cart: To update the item quantities present in the shopping cart

• Checkout shopping cart: To check out from the shopping cart into the payment section

• Add shipping address: To add a shipping address

• Add credit card: To pay the order amount via credit card

• Make payment: To pay the order amount via credit card, electronic bank transfer, or cash on delivery

• Manage shipment: Manage shipment-related cases, such as sending an order for shipment, update shipment status, and sending notifications whenever shipment status changes.

• Track shipment: To track the shipment status.

Guest

• Register account: To register for an account on Amazon

• Search product: To search for any particular product based on the given criteria (name or category)

System

• Send order notification: To send a notification of an order after payment

• Send shipment update notification: To send a notification of any updates in the shipment

Relationships

This section describes the relationships between and among actors and their use cases.

Associations

The table below shows the association relationship between actors and their use cases.