The UML class diagram for an HR management system illustrates the relationships between admin, department, employee, leave, payroll, and the HR system. The diagram shows how employees apply for leave, view pay slips, and update profiles, while admins manage employee records and departmental data. Each class contains attributes such as employee ID, leave ID, and payroll ID, and relevant methods like approve leave(), calculate salary(), and monitor system(). This UML class diagram provides a clear visualization of how human resource operations, such as payroll and leave management, are organized and automated.
