About This Architecture

Chen ER diagram modeling a human resources database with Person, Employee, Department, Project, and Address entities. The schema captures employee hierarchies through foreign keys linking employees to departments and persons, while a junction table Employee_Project tracks project assignments with role and hours allocated. This normalized structure demonstrates best practices for managing organizational data, separating concerns between personal information, employment records, and project allocations. Fork and customize this diagram on Diagrams.so to adapt it for your HR system, add additional attributes, or export as .drawio or PNG for documentation. The design supports complex queries on department budgets, manager hierarchies, and resource allocation across projects.

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How do you design a normalized relational database schema for managing employees, departments, and project assignments?

This Chen ER diagram demonstrates a normalized HR schema separating Person (core identity), Employee (employment details), Department (organizational units), Project (initiatives), and Address (location data) entities. Foreign keys establish relationships: employees belong to departments, persons have addresses, and employees are assigned to projects via a junction table tracking role and hours al