Level 0 DFD for Glocare Pharmacy Management System models four core processes: Manage Drugs, Manage Appointments, Process Sales, and Generate Reports, with interactions between Pharmacy Staff, Patients, and Suppliers. Data flows bidirectionally between processes and three persistent stores—Drug Database, Appointment Records, and Sales Records—ensuring inventory, scheduling, and transaction integrity. This architecture demonstrates separation of concerns and data isolation best practices critical for HIPAA-compliant healthcare applications. Fork this diagram on Diagrams.so to customize for your pharmacy workflow, add AWS service mappings, or extend with additional processes like insurance billing or prescription refills. Consider adding a separate audit log database to track all data modifications for compliance and troubleshooting.