describe the need for each entity listed below and how it contributes to the information required by a physician IS:

Appointments
Patient information
Billing
Patient visits
Insurance claims
Doctor
Nurse
Receptionist
Laboratory
What is the purpose of a DFD? What other ways might you represent the flow of information within an IS? Would a flowchart suffice? Why or why not? How does a DFD differ from an entity relationship diagram?

Design a sequence diagram (use Word or Visio) showing a patient making an appointment. describe why this is an appropriate method of documentation and how it may be used to help the scheduling staff visualize how the IS would work. describe the advantages and disadvantages of this OO technique.

Respond to assigned problems using the lessons and vocabulary found in the reading. Support your answers with exs and research, and cite your research using the APA format.