Data Flow Diagram Create Context Diagram and Level-0 DFD based on the following business scenario. With a patient portal, patients can access their medical records, schedule appointments, and fill prescriptions. Lets look at the medical record function of the patient portal. 1. The system will show a patients medical history such as test results, ongoing health conditions, and immunizations records.

2. If there is an ongoing health conditions, both patient and doctor will receive alert when the alert condition is triggered. Alert conditions are set by doctors.

3. When a physician receives alert, he or she can view and respond to the alert.

4. Patient requests and receives alert data.

5. Physician sends test results to the system and patient can request and access test results.

6. Physician sends and annotates immunization records and patient view immunization records.

7. Patient and physician can exchange messages.