Activity Diagram for Hotel Room Booking
The UML activity diagram is a diagram that presents the flow of hotel room booking system activities. It is one of the methods used to document the system’s behavior in …
Activity Diagram Examples — 30+ Free UML Activity Diagrams for BSIT Capstones (2026)
itsourcecode.com hosts 30+ free Activity Diagram examples for BSIT capstone projects (2026) — complete UML activity diagrams showing workflow logic, decision branches, and process flows for the most common capstone domains. Each is capstone-ready for Chapter 3 documentation.
What is an Activity Diagram?
An Activity Diagram is a UML behavioral diagram that models the flow of activities within a process — think of it as a flowchart with UML notation. Key elements: Initial Node (filled black circle — start), Activity (rounded rectangle — action), Decision Node (diamond — branch), Merge Node (diamond — converge), Fork/Join (thick black bar — parallel activities), Final Node (circled black dot — end). Activity diagrams show HOW the system behaves, complementing Use Case diagrams which show WHAT it does.
When to use Activity Diagrams in capstone
- Chapter 3 (Methodology) — model the main workflows your system supports (Login flow, Order processing, Payment, Approval).
- Decision-heavy processes — when a workflow has multiple if/else branches, the activity diagram is clearer than text.
- User onboarding flows — registration, verification, first-use guides.
- Parallel processing — fork/join shows operations that happen simultaneously (e.g., send SMS + send email + log to database all in parallel).
Featured Activity diagrams by system domain
🎓 School, Student & Library
- Student Enrollment Activity
- Student Management Activity
- School Management Activity
- College Management Activity
- University Management Activity
- Library Management Activity
- Attendance Management Activity
- Online Examination Activity
- Course Registration Activity
- Hostel Management Activity
🏥 Hospital & Blood Bank
🍽️ Hotel, Restaurant & Hospitality
- Hotel Management Activity
- Hotel Room Booking Activity
- Restaurant Management Activity
- Online Food Ordering Activity
🛒 E-commerce, Shop & Inventory
- Online Shopping System Activity
- Shopping Cart Activity
- E-commerce Website Activity
- Point of Sale Activity
- Inventory Management Activity
🏦 ATM, Banking & Payroll
- ATM Management Activity
- Bank Management Activity
- Online Banking Activity
- Credit Card Processing Activity
- Payroll Management Activity
- Employee Management Activity
🚗 Transport, Travel & Reservation
🔐 Authentication & AI
About this Activity diagram collection
Curated since 2015 by PIES Information Technology Solutions, Binalbagan, Negros Occidental, Philippines. Used by 12,000+ BSIT students monthly. Pair each Activity diagram with the matching Use Case and Sequence Diagram for a complete Chapter 3 documentation set.
Related UML diagram collections
- UML Diagrams Library — parent collection, 300+ diagrams
- ER Diagrams — 35+ ERDs
- Data Flow Diagrams — 40+ DFDs
- Use Case Diagrams — 40+ Use Cases
- Sequence Diagrams — 35+ Sequence diagrams
- Class Diagrams — 30+ Class diagrams
- Components Diagrams
- Deployment Diagrams
- Final Year Projects
Activity Diagram for Shopping Cart | UML
Activity Diagram for Shopping Cart The UML activity diagram for shopping cart is a diagram that presents the flow of shopping activities. It is also used to emphasize the system’s …
Activity Diagram for Credit Card Processing System | UML
Credit Card Processing System Activity Diagram The UML activity diagram is a diagram that presents the flow of credit card processing system activities. It is one of the methods used …
Activity Diagram for Login and Registration | UML
Activity Diagram for Login and Registration The UML activity diagram for login and registration is a diagram that presents the flow of system activities. It is one of the methods …
Activity Diagram for Login Page
Activity Diagram for Login Page – The flow of system activities is illustrated in the UML activity diagram for the login page system. It is one way to keep track …
Activity Diagram for Course Registration System | UML
Activity Diagram for Course Registration System The UML activity diagram for course registration system is a diagram that presents the flow of system activities. It is one of the methods …
Student Enrollment System Activity Diagram 2026: Complete UML [Free Download]
Activity Diagram for Student Enrollment System The UML activity diagram for student enrollment system is a diagram that presents the flow of system activities. It is one of the methods …
Activity Diagram for Car Rental System
The UML activity diagram for car rental system is a diagram that presents the flow of system activities. It is one of the methods used to document the system behavior …
Activity Diagram for Face Recognition Attendance System
The UML activity diagram for face recognition system is a diagram that presents the flow of system activities. It is one of the methods used to document the system behavior …
Activity Diagram for University Management System
An Activity Diagram for the University Management System is a picture that was made to show how the University System works. It shows the activity on how the system and …
Activity Diagram for Ecommerce Website
The activity diagram for e commerce website is one of the behavioral diagrams based on UML. It shows the system’s behavior by presenting the flow of activities from one process …
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 …
Inventory Management System Activity Diagram
Activity Diagram for Inventory Management System is a designed illustration that shows the systems behavioral aspect. It shows the Inventory Management system behavior in terms of responding to its users. …
Frequently Asked Questions
What is the difference between Activity Diagram and Flowchart?
A flowchart shows control flow with general-purpose symbols (decision diamond, process rectangle, terminator oval). An Activity Diagram is a UML-standardized flowchart with specific UML symbols (filled-circle initial node, rounded-rectangle activity, diamond decision, thick-bar fork/join, circled-dot final node) and the ability to show parallel activities (fork/join) which classic flowcharts cannot. For capstone Chapter 3, use Activity Diagram if your school requires UML; use flowchart if they accept general diagrams.
What is the difference between Activity Diagram and Sequence Diagram?
Activity Diagram focuses on WORKFLOW — what happens, in what order, with what decisions. No specific objects called out. Sequence Diagram focuses on OBJECT INTERACTION — which object calls which method on which other object, and in what order. Activity = "how does the process flow?" Sequence = "which objects do what?" Capstones usually need both.
What are fork and join nodes for?
Fork (thick black horizontal bar) splits one flow into multiple parallel flows that happen simultaneously. Join (also a thick black bar) merges parallel flows back into one. Useful when actions happen in parallel: e.g., after a user pays, your system simultaneously (1) updates the database, (2) sends SMS confirmation, (3) emails the receipt. Fork from "Process Payment," join before "Show Success Screen."
How detailed should my Activity Diagram be?
For BSIT capstone Chapter 3, draw 1-3 Activity Diagrams covering your most important workflows (Login + main user flow + admin flow). Each diagram should have 5-15 activities. More than 20 activities means the workflow is too complex — split into sub-diagrams. Less than 5 means the workflow is too trivial to need a diagram.
What free tool should I use to draw an Activity Diagram?
draw.io / diagrams.net — free, web-based, has UML Activity shapes built in (initial, activity, decision, fork, final). Lucidchart Free — prettier output. Visual Paradigm Community — full UML support. PlantUML — text-based, version-controllable, great for technical docs. Pick draw.io for fastest capstone iteration.
Should I include swimlanes in my Activity Diagram?
Swimlanes (vertical columns labeled with actor/department names) clarify WHO performs each activity. Use them when your workflow crosses multiple roles (Customer / Cashier / Admin / Inventory Clerk all participate). Skip swimlanes for single-actor workflows. Many BSIT capstones include swimlanes for the main workflow but omit them in simpler sub-flows.
How often is this Activity Diagram collection updated?
New Activity Diagrams are added regularly. Existing diagrams are revised when UML 2.5.x notation updates. Last refreshed: May 2026.