Docstoc

For the following situation_ draw a context-level diagram and a

Document Sample
For the following situation_ draw a context-level diagram and a Powered By Docstoc
					DCS5128-System Analysis & Design

Example: Chapter 7

DFD SAMPLE CASE STUDY
Case study #1 For the following situation, draw a context-level diagram and a level-0 data flow diagram. Kellogg State Bank provides car and home loans to its banking customers. Initially, a potential loan customer meets with a Kellogg loan officer, requests a loan for a certain amount and time frame, and completes a loan application. Next, the loan officer determines the customer’s credit standing, the type of loan required, and available interest rates. While the loan officer can authorize car loans for credit worthy customers, a loan committee must approve all home loans. A suggested context-level data flow diagram is provided below.

A suggested level-0 data flow diagram is provided below.

1/3

DCS5128-System Analysis & Design

Example: Chapter 7

Case study #2 The pharmacy at Mercy Hospital fills medical prescriptions for all hospital patients and distributes these medications to the nurse stations responsible for the patients’ care. Prescription are written by doctors and sent to the pharmacy. A pharmacy technician reviews each prescription and sends it to the appropriate pharmacy station. Prescriptions for drugs that must be formulated (made-on site) are sent to the lab station, prescriptions for off-the-shelf drugs are sent to the shelving station, and prescriptions for narcotics are sent to the secure station. At each station, a pharmacist reviews the order, checks the patients the patients’ file to determine the appropriateness of the prescription, and fills the order if the dosage is at a safe level and it will not negatively interact with the other medications or allergies indicated in the patient’s file. If the pharmacist does not fill the order, the prescribing doctor is contacted to discuss the situation. In this case, the order may ultimately be filled, or the doctor may write another prescription depending on the outcome of the discussion. Once filled, a prescription label is generated listing the patient’s name, the drug type and dosage, an expiration date, and any special instructions. The label is placed on the drug container, and the order is sent to the appropriate nurse station. The patient’s admission number, the drug type and amount dispensed, and the cost of the prescription are then sent to the billing department. A suggested answer is provided below.

Hospital Pharmacy Context Diagram

Prescription Doctor Unfilled Order Info

0 Drug Label Info Hospital Pharmacy System Patient Number and Drug Type, Amount & Cost Store Manager

Unfilled Order Info Response

2/3

DCS5128-System Analysis & Design

Example: Chapter 7

Hospital Pharmacy - Level-0 Diagram

1 Doctor Prescription Review & Send Prescription to Station Pharmacy Tech Review

Unfilled Order Info Unfilled Order Info Response Prescription

D 1

Patient File

2 Review Prescription Order by Station Order Info 3 Fill Order

Patient Info

Order Fill Info

Drug Label Info 4 Generate Label

Patient Number and Drug Type, Amount & Cost

Billing Dept

Drug Label Info Nurses Station

3/3


				
DOCUMENT INFO