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Activity Diagram for Hotel Room Booking

Activity Diagram for Online Hotel Room Booking System

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 …

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Activity Diagram for Shopping Cart | UML

Activity Diagram for Shopping Cart

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 …

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Activity Diagram for Car Rental System

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 …

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Activity Diagram for Ecommerce Website

Activity Diagrams of E-Commerce Website System

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 …

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Activity Diagram for Point of Sale System

Activity Diagrams of POS 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 …

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Inventory Management System Activity Diagram

Activity Diagrams of Inventory Management System

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. …

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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.