Use Case Diagram Examples — 40+ Free UML Use Cases for BSIT Capstones (2026)

itsourcecode.com hosts 40+ free Use Case diagram examples for BSIT capstone projects (2026) — complete UML use case diagrams with actors, use cases, system boundaries, and include/extend relationships for the most common capstone domains. Capstone-ready for Chapter 3 documentation. Browse by system below.

What is a Use Case Diagram?

A Use Case Diagram is a behavioral UML diagram that captures what your system DOES from the user’s perspective. It shows: Actors (stick figures — users, admins, external systems), Use Cases (ellipses — actions the system performs: Login, Add Book, Process Payment), System Boundary (rectangle around use cases — defines scope), and Relationships (association lines plus <> / <> for shared or optional behaviors). Use Case diagrams are mandatory in Chapter 3 of BSIT capstones.

How to draw a Use Case Diagram (5 steps)

1. List the actors — every user role that interacts with the system. Common ones: Admin, User/Customer, Manager, Guest. Outside systems count too (Payment Gateway, SMS API).
2. List the use cases — every action your system performs. Use verb-noun format: “Login,” “Manage Students,” “Generate Report,” “Process Payment.”
3. Connect actors to use cases — draw lines from each actor to the use cases they trigger.
4. Add includes / extends — <> for reused functionality (every transaction includes Login); <> for optional behavior (Print Receipt extends Process Payment).
5. Draw the system boundary — rectangle around all use cases with the system name at the top. Actors stay OUTSIDE the boundary.

Featured Use Case diagrams by system domain

🎓 School, Student & Library

• Student Information System Use Case
• Student Registration System Use Case
• College Registration System Use Case
• University Admission System Use Case
• School Management System Use Case
• Student Grading System Use Case
• Library Management System Use Case
• Online Examination System Use Case
• Course Registration System Use Case
• Employee Attendance Use Case
• Student Attendance Use Case
• Hostel Management System Use Case

🏥 Hospital, Pharmacy & Healthcare

• Hospital Management System Use Case
• Pharmacy Management Use Case

🍽️ Hotel, Restaurant & Hospitality

• Hotel Management System Use Case
• Hotel Reservation Use Case
• Online Food Ordering Use Case
• Movie Ticket Booking Use Case
• Online Ticket Reservation Use Case
• Event Management Use Case

🛒 E-commerce, Shop & Inventory

• E-commerce Website Use Case
• Online Shopping System Use Case
• Online Shopping Cart Use Case
• Inventory Management Use Case

🏦 ATM, Banking & Authentication

• Bank Management Use Case
• Credit Card Processing Use Case
• Login Use Case
• Login and Registration Use Case
• Face Recognition Attendance Use Case

🚗 Transport, Travel & Reservation

• Online Airline Reservation Use Case
• Railway Reservation Use Case

📘 Tutorials & References

• UML Use Case Diagram Tutorial (Examples)

About this Use Case diagram collection

Curated since 2015 by PIES Information Technology Solutions, Binalbagan, Negros Occidental, Philippines. Used by 12,000+ BSIT students monthly. Pair each Use Case with the matching ER Diagram and DFD for a complete Chapter 3 documentation set.

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