Draw a context diagram, functional decomposition diagram and a level 0 diagram

for the accompanying dentist office system, but do not bother to

identify the steps within each use case. (Just complete the information at the top of the

use case form.) When new patients are seen for the first time, they complete a patient

information form that asks for their name, address, phone number, and brief medical

history, which are stored in the patient information file. When a patient calls to schedule

a new appointment or change an existing appointment, the receptionist checks the

appointment file for an available time. Once a good time is found for the patient, the

appointment is scheduled. If the patient is a new patient, an incomplete entry is made in

the patient file; the full information will be collected when the patient arrives for the

appointment. Because appointments are often made far in advance, the receptionist

usually mails a reminder postcard to each patient 2 weeks before the appointment.