Industrial Attachment Management System ER diagram models a multi-role platform connecting students, supervisors, coordinators, and companies through centralized placement and activity tracking. CustomUser serves as the authentication backbone with role-based access, while StudentProfile, SupervisorProfile, and CoordinatorProfile extend user accounts with role-specific metadata. AttachmentPlacement acts as the core junction entity linking students to supervisors, coordinators, and companies, with DailyActivity, Attendance, and WeeklyReport capturing placement progress and compliance. This schema enforces data integrity through foreign keys and supports workflow automation for approval statuses and attendance tracking. Fork this diagram on Diagrams.so to customize entity relationships, add constraints, or export as .drawio for your database design documentation. The design prioritizes audit trails and multi-stakeholder workflows common in educational and corporate internship programs.