5. Nonfunctional Requirements

5.1 Performance

• 20 admin/faculty concurrent users
• 100 student users concurrently
• Support for 100 instructors and 1,500 students

5.2 Safety

• Physical backups of all critical data

5.3 Security

• Secure login and RBAC enforcement
• All unauthorized actions are denied

5.4 Software Quality

• User-friendly interface
• 99% uptime during academic sessions
• Maintainable and scalable system

5.5 Business Rules

• Role-based access
• Final grades are immutable once submitted
• Audit trail for all actions