Nothing close enough? Start from a blank use case diagram → Describe it in one paragraph.
How to use an use case diagram template.
- 01Identify Actors
List all users and external systems that interact with the online shopping platform—customers, administrators, payment gateways, inventory systems.
- 02Define Use Cases (Goals)
Capture what each actor needs to achieve, like 'Browse Products', 'Add to Cart', 'Checkout', 'Manage Orders', 'Process Payment'.
- 03Draw Associations
Connect actors to their use cases with lines, showing which actor initiates or participates in each goal.
- 04Set System Boundary
Draw a box around all use cases to mark the scope of the online shopping system—everything inside is part of the solution.
- 05Add Includes and Extends
Refine by linking reusable or conditional behaviors: e.g., 'Checkout' includes 'Payment Processing', and 'Apply Coupon' extends 'Checkout'.
Questions about use case diagram templates
What are the main actors in an online shopping use case diagram?
Typically you’ll have a Customer (primary), an Administrator or Store Manager, a Payment Gateway (secondary system), and sometimes a Shipping Provider or Inventory System.
How do I represent guest checkout in a use case diagram?
You can model 'Guest Checkout' as a use case associated with an unregistered user actor, or as an extension of a core 'Checkout' use case, with a note that the actor is a Guest.
Can I include the shopping cart as a separate use case?
Yes—'Manage Cart' is a common use case, often including 'Add Item', 'Remove Item', and 'Update Quantity'. Keep it separate if the cart has significant logic.
Is there a difference between a mobile shopping app and a website use case diagram?
The core interactions are similar, but a mobile app may include device-specific use cases like 'Scan Barcode' or 'Pay with Apple Pay', and the actor might be 'Mobile User' instead of generic Customer.
What tool can I use to create an online shopping use case diagram?
Our free use case diagram maker lets you draw, label, and share diagrams online without complex software. You can start from a blank canvas or customize one of the examples above.