1. Information System Analysis
Lab 5

2. Objectives In this lab we will learn :
How to draw level 0 diagram for Online Rental Car System .
Discuss Context diagram for Easy Travel Agency specifications.

3. Example 1:Online Car Renter System
Inputs:
1-Customer can enter rental requirements.
2-Customer can select a car.
3-Customer can reserve a car.
Outputs
1-system should provide available cars.
2- system should provide total rental price.
3- System should provide invoice if customer reserves a car .
Processes
1- system should be able to check car availability as per the customer requirements.
2- system should be able to calculate total rental charge for the customer’s rental requirements
3- system should be able to process credit card payment through the company bank
4- system should reserve the car for the customer by sending a notification to the garage.

4. Online Car Rental System
Creating DFD
1-Draw Context Diagram
Reservation Info
Car Choice
Rental Requirements
Online Car Rental System
Notification
Credit Card Info
Available Car List
Customer
Bank
Authorization
Rental Summery
Invoice
Credit Card Notification
Rental Notification
Garage

5. Creating DFD 2-Draw level 0 diagram Rental Requirements 1.0
Check Availability
Customer
Notification
Available Car List
Car List
D1:Cars File
Car Choice
2.0
Produce
Rental
Summary
Rental Summary
Reservation Info
Bank
Credit Card Info
3.0
Process
Payment
Invoice
Authorization
Card Declined Notification
Rental Details
D2:Customers File
4.0
Book Cars
Rental Notification
Customers Booking
Garage
D1:Cars File
Update Car

6. Level 0 diagram all blue data flow are from context diagram
Rental Requirements
1.0
Check Availability
Customer
Level 0 diagram
Notification
Available Car List
Car List
Shows all the major processes that comprise the overall system.
It is the child of the context diagram.
Balancing.
The input and output data flows of a parent DFD must be maintained in the child DFD
Add data store.
all blue data flow are from context diagram
D1:Cars File
Car Choice
2.0
Produce
Rental
Summary
Rental Summary
Reservation Info
Bank
Credit Card Info
3.0
Process
Payment
Invoice
Authorization
Card Declined Notification
Rental Details
D2:Customers File
4.0
Book Cars
Rental Notification
Customers Booking
Garage
D1:Cars File
Update Car

7. Discuss Context diagram for Easy Travel Agency specifications

8. Example 2: Easy Travel Agency specifications
EasyTravel is a travel agency specializing in family holidays. It holds lists of hotels and charter flights and creates organized holidays for clients. Currently the company uses a paper based system.
The company its tasks by the following text:
Bookings are made either through a list of agents, or by direct approach from clients.
When a client/agent makes an approach, the Reservations Clerk selects appropriate flight and hotel details for the customer and makes a provisional booking. The details are entered onto a provisional booking file.

9. Easy Travel Agency specifications
The customer must confirm this booking within three days, by sending a deposit of 10% of costs. On receipt of this deposit, Reservations close the provisional booking and add the details to their full booking file.
Four weeks before the flight is due, Accounts send an invoice to the clients for the balance. Accounts notify Customer Services when the balance is received and Customer Services then send tickets and joining instructions.
Reminders are sent to customers three weeks and one week before departure. Although the company insists that payment is made at least one week before departure, it has been known that payment has been made and tickets received on the morning of the flight.
At the end of each month, commission of 15% is paid to any agents responsible for holidays commencing during that month.

10. Agency Booking system Context Diagram Provisional booking
Agency
Booking
system
Provisional booking
Client details
Invoice
Client/Agent
Pay 10%
Client/Agent
Ticket instruction
Reminders
Pay balance
15% commissions
Agent

12. Draw
Level 0 diagram using Visio
For Easy Travel Agency system

13. any Q