Component Diagram for Employee Management System
Component Diagram for Employee Management System The component diagram for employee management system is used to show how the parts of employee management work together to make the system operate …
Component Diagram Examples: 25+ Free UML Component Diagrams for BSIT Capstones (2026)
itsourcecode.com hosts 25+ free Component Diagram examples for BSIT capstone projects (2026): complete UML component diagrams showing system architecture, software components, and their interfaces for the most common capstone domains. Capstone-ready for Chapter 3 documentation.
What is a Component Diagram?
A Component Diagram is a UML structural diagram that shows how a system is divided into components, the high-level building blocks of your software architecture. Components communicate via interfaces (the “lollipop” notation: provided interface = circle, required interface = half-circle). Components can be: Business Logic (Order Processor, Authentication Module), UI (Login Page, Dashboard), Data Access (Database Connector, File Handler), or External Services (Payment Gateway, SMS API). Component diagrams answer “what are the major pieces of my system and how do they connect?”
When to use a Component Diagram in capstone
Your system has 5+ major modules that need clear separation
You are using a layered architecture (UI / Business Logic / Data Access)
You integrate with external services (Payment, SMS, Cloud Storage)
Your panel asks “what is your system architecture?”, Component diagram answers it
Featured Component diagrams by system domain
🎓 School, Student & Library
Student Registration Component
School Management Component
College Management Component
Library Management Component
Attendance Management Component
Online Examination Component
Course Registration Component
🏥 Hospital & Blood Bank
Hospital Management Component
Blood Bank Management Component
🍽️ Hotel, Restaurant & Event
Hotel Management Component
Hotel Reservation Component
Online Food Ordering Component
Restaurant Management Component
Event Management Component
🛒 E-commerce, Shop & Inventory
E-commerce Website Component
Online Shopping Cart Component
Online Shopping System Component
Point of Sale Component
Inventory Management Component
🏦 ATM, Banking & Payroll
ATM System Component
Bank Management Component
Credit Card Processing Component
Payroll System Component
Employee Management Component
🚗 Transport, Travel & Reservation
Railway Reservation Component
Airline Reservation Component
Car Rental Component
🔐 Authentication & AI
Login System Component
Face Recognition System Component
About this Component diagram collection
Curated since 2015 by PIES Information Technology Solutions, Binalbagan, Negros Occidental, Philippines. Used by 12,000+ BSIT students monthly. Pair each Component diagram with the matching Deployment Diagram for full system architecture documentation in Chapter 3.
Related UML diagram collections
UML Diagrams Library, parent collection, 300+ diagrams
Deployment Diagrams, 25+ deployment topology diagrams (paired with Components)
ER Diagrams, 35+ ERDs
Data Flow Diagrams, 40+ DFDs
Use Case Diagrams, 40+ Use Cases
Class Diagrams, 30+ Class diagrams
Sequence Diagrams
Activity Diagrams
Final Year Projects
Component Diagram for Blood Bank Management System
Component Diagram for Blood Bank Management System The component diagram for blood bank management system is used to show how the parts of management work together to make the system …
Component Diagram for Restaurant Management System
Component Diagram for Restaurant Management System The component diagram for restaurant management system shows how the parts of restaurant management work together to produce an efficient output and make sure …
Component Diagram for Payroll System
Component Diagram for Payroll Management System The component diagram for payroll management system is used to show how the system’s parts work together to make the desired payroll operate correctly. …
Component Diagram for E-commerce Website | UML
Component Diagram for E-commerce Website System The component diagram of e-commerce website is used to show how the parts work together to make the website operate correctly. A component diagram …
Component Diagram for Inventory Management System | UML
Component Diagram for Inventory Management System The component diagram for inventory management system is used to show how the parts of inventory management work together to make the system operate …
Component Diagram for Student Registration System
Component Diagram for Student Registration System The component diagram for student registration system is used to show how the parts work together to make the system operate correctly. A component …
Component Diagram for School Management System
Component Diagram for School Management System The component diagram for school management system is used to show how the parts work together to make the system operate correctly. A component …
Component Diagram for Car Rental System | UML
Component Diagram for Car Rental System The component diagram for car rental system is used to show how the parts work together to make the car system operate correctly. A …
Component Diagram for Online Examination System | UML
Component Diagram for Online Examination System The component diagram of online examination system is used to show how the system’s parts work together to make it operate correctly. This component …
Component Diagram for Bank Management System | UML
Component Diagram for Bank Management System The component diagram of bank management system is used to show how the parts work together to make the bank system operate correctly. A …
Component Diagram of College Management System
Component Diagram for College Management System The component diagram of college management system is used to show how the parts work together to make the college system operate correctly. A …
Component Diagram for Hotel Management System
The Component Diagram for Hotel Management System is used to show how the parts work together to make the hotel system operate correctly. A component diagram shows how the software’s …
Frequently Asked Questions
What is a Component Diagram?
A Component Diagram is a UML structural diagram showing how a system is divided into software components — the major building blocks of your architecture. Components communicate via interfaces (the "lollipop" notation — provided interface is a circle, required interface is a half-circle). Components can be business logic modules, UI layers, data access layers, or external services like payment gateways.
What is the difference between Component Diagram and Class Diagram?
Class Diagram is fine-grained — individual classes with attributes and methods. Component Diagram is coarse-grained — groups of related classes packaged as deployable units (e.g., "Authentication Module" contains multiple Java classes). Use Class Diagram for code-level documentation; use Component Diagram for architectural overview.
What is the difference between Component Diagram and Deployment Diagram?
Component Diagram shows WHAT software components exist and how they connect logically. Deployment Diagram shows WHERE each component physically runs (which server, laptop, mobile device). Most capstones with web/cloud deployment include BOTH: Component for logical architecture, Deployment for physical topology.
When should I include a Component Diagram in my capstone?
Include when: (1) Your system has 5+ major modules that need clear separation. (2) You use a layered architecture (Presentation / Business Logic / Data Access). (3) You integrate with external services (Payment Gateway, SMS API, Cloud Storage). (4) Your panel asks "what is your system architecture?" Skip for trivial single-file scripts or basic CRUD apps with no external integration.
What are provided and required interfaces?
A provided interface (drawn as a circle/lollipop on the component) is functionality the component OFFERS to others (e.g., the Authentication Module provides an "authenticate(user, pass)" interface). A required interface (drawn as a half-circle/socket) is functionality the component NEEDS from another (e.g., Authentication requires a "userRepository" interface that the Data Access Layer provides). When a lollipop fits into a socket, the components are connected.
What free tool should I use to draw a Component Diagram?
draw.io / diagrams.net — free, web-based, has UML Component shapes (lollipop, socket, component rectangle). Visual Paradigm Community — full UML support with auto-layout. PlantUML — text-based, fast iteration. Lucidchart Free — limited free tier. Pick draw.io for capstone speed.
How often is this Component Diagram collection updated?
New Component Diagrams are added regularly. Existing diagrams are revised when UML 2.5.x notation updates. Last refreshed: May 2026.