This is my academic program for the car renting system. I use software Visual Paradigm to create UML diagrams, including one use case diagram, six sequence diagrams, and one class diagram.

1. Star Car Rental System
USE CASE DIAGRAM

2. USE CASE UC1 View cars’ information
Goal in Context A customer wants to request detailed information about cars, such as
quotation, vehicle type, vehicle makes, and vehicle models.
Scope & Level Star Car Rental System, Secondary Task
Preconditions None
Postconditions The customer makes a decision about whether to rent cars or not.
Primary,
Secondary Actors
Customer, Staff : Primary
Trigger The customer calls Star Car Rental company or logs in the website of
Star Car Rental company.
DESCRIPTION Step Action
1 The customer calls Star Car Rental company to communicate
with the staff or logs in the website of Star Car Rental
company.
2 The customer asks staff car information by phone or searches
car information on the company’s website.
3 Staff tells the customer about details of cars by phone or
website presents the results (see OI 1).
4 The customer asks the quotation for the car by phone or
searches the quotation for the car on the internet.
5 Staff tells the quotation for the car by phone or website
presents the quotation (See OI 2).
6 The customer receives the results.
EXTENSIONS Step Branching Action
1a 1 Star Car Rental company does not answer the phone when
the customer calls the company.
1 The customer does not get information about renting
car.
2 The customer logs on the website to search the
information.
2 The customer cannot access to the internet.
1 The customer calls Star Car Rental company.
2 The customer cannot get information.
3a The customer is not satisfied with the car.
Process ends.
5a The customer is not satisfied with the quotation.
Process ends.

3. OTHER
INFORMATION
1 The company rents cars on basis of car model and standard
rate (daily, weekly, weekend, additional kilometer charge).
The first 200km are included in charges for every vehicle. All
the cars are four door models with air conditioning and
automatic transmission. The categories are Economy(E),
Star(B), Midsize(M), Full Size(F), Passenger Van(V), SUV(S).
2 Rate Class Daily
Charge
Weekly
Charge
Weekend
Charge
Additional
Kilometre
Charge
Economy(E) $34.99 $149.99 $39.99 $0.20
Star(B) $39.99 $169.99 $44.99 $0.22
Midsize(M) $44.99 $189.99 $49.99 $0.25
Full Size(F) $49.99 $209.99 $54.99 $0.27
Passenger
Van(V)
$59.88 $212.99 $58.99 $0.29
SUV(S) $70.99 $220.99 $70.99 $0.35
REPORTS None
UNRESOLVED
ISSUES
None

4. USE CASE UC2 Book cars
Goal in Context A customer wants to rent a car to drive.
Scope & Level Star Car Rental System, Primary Task
Preconditions The customer gains suitable car information and the quotation for the
car.
Postconditions The customer completes entering information.
Primary,
Secondary Actors
Staff, Customer : Primary
Bank, Insurance Company : Secondary
Trigger The customer gains satisfying information of the car.
DESCRIPTION Step Action
1 The customer gains satisfying information of the car.
2 System asks customer to supply credit card details.
3 The customer supplies credit card information.
4 The details are validated.
5 System mails or emails the confirmation of arrangement to the
customer.
6 The customer enters the personal information and payment
information.
7 The customer searches the vehicle types and prices for booking
(See OI 1).
8 The customer enters pick-up and drop-off location, dates and
their age.
9 The customer gets quote for renting a car.
10 The customer is given other important information as well as
insurance details and pick up instructions (See OI 2).
11 Manager views booking information.
EXTENSIONS Step Branching Action
3a The customer enters the wrong payment information.
1 The customer will be informed to re-enter the payment
information.
2 The customer cannot make a booking.
4a The customer’s credit card information cannot be validated by
bank.
1 System informs the customer.
2 Booking is not successful.

5. OTHER
INFORMATION
1 Rate Class Daily
Charge
Weekly
Charge
Weekend
Charge
Additional
Kilometre
Charge
Economy(E) $34.99 $149.99 $39.99 $0.20
Star(B) $39.99 $169.99 $44.99 $0.22
Midsize(M) $44.99 $189.99 $49.99 $0.25
Full Size(F) $49.99 $209.99 $54.99 $0.27
Passenger
Van(V)
$59.88 $212.99 $58.99 $0.29
SUV(S) $70.99 $220.99 $70.99 $0.35
2 Customer is given other important information such as age
restrictions, fuel conditions.
REPORTS None
UNRESOLVED
ISSUES
None

6. USE CASE UC3 Respond booking information
Goal in Context The system makes a confirmation for booking cars.
Scope & Level Star Car Rental System
Secondary Task
Preconditions A customer has already completed the booking process
Postconditions Staff confirms the booking information.
Actors Staff, Customer: Primary
Trigger The system checks the completeness and correctness of the customer’s
data entry.
DESCRIPTION Step Action
1 The system checks the completeness and correctness of the
customer’s personal information and payment information
(See OI 1).
2 The system confirms the booking with a rental confirmation
number.
3 System sends an e-mail to the customer.
4 The customer receives the e-mail with rental number.
5 The customer uses the rental number and last name to view the
booking information.
EXTENSIONS Step Branching Action
1a The customer’s personal information is not completed.
1 The booking is not successful.
2 The system will send an e-mail to customer.
1b The customer’s payment information is not corrected.
1 The booking is not successful.
2 The system will send an e-mail to customer.
5a The customer changes or cancels the car booking.
OTHER INFORMATION 1 Personal information includes name, address, telephone
number and e-mail address. Payment information is credit card
details.

7. REPORTS None
UNRESOLVED ISSUES None

8. USE CASE UC4 Pick up car
Goal in Context A customer drives the car away.
Scope & Level Star Car Rental System
Secondary Task
Preconditions A customer books the car successfully.
Postconditions A customer drives the car away.
Actors Customer, Staff: Primary
Trigger The customer arrives at the pick-up location.
DESCRIPTION Step Action
1 The customer arrives at the pick-up location.
2 The customer signs the rental agreement (see OI 1,2).
3 Staff confirms the rental agreement that the customer signs.
4 Staff gives the key of the car to the customer.
5 The customer drives the car away.
EXTENSIONS Step Branching Action
2a The customer renting the car is not the driver, and there are
many drivers.
For each driver, the following information needs to be
captured: full name, birth date, driver’s license number and
state of issue of driver’s license.
2b 1 The customer accepts damage waiver which is $8.99 per
day.
There is no charge for physical damage to the vehicle.
2 The customer does not accept damage waiver.
The customer needs to pay a $1000.00 deductible applies to
body damage.
OTHER
INFORMATION
1 A rental agreement includes an agreement number, the
customer’s name, type of rate, car identification, car price
category, the date time mileage, expected date and time of
return and damage waiver.
2 Information about the third party who may be paying the bill
also needs to be captured.
REPORTS None
UNRESOLVED
ISSUES
None

9. USE CASE UC5 Return cars
Goal in Context A customer returns the car to the company.
Scope & Level Star Car Rental System, Primary Task.
Preconditions The customer does not need to use the car any longer.
Postconditions The company receives the car, and the car is ready to be rented again.
Actors Staff ,Customer : Primary
Trigger The customer arrives at the drop-off location.
DESCRIPTION Step Action
1 The customer arrives at the drop-off location.
2 Staff inspects the car’s tank.
3 Staff records the date, time and mileage.
4 Staff inspects for damage.
5 Staff inspects to determine the need of minor maintenance.
6 The car passes inspection.
7 The car sent to a car wash and placed to be rent again.
EXTENSIONS Step Branching Action
2a The tank is not full.
1 The customer refuels the vehicle.
2 Staff refuels the vehicle and the customer pays for it.
3a The customer return car late and pays fines (UC6).
4a The car has been damaged.
1 The customer pays the cost for repairing.
2 There is no charge for physical damage.
5a The car needs minor maintenance.
The car is sent to the shop for needed repairs and
maintenance.
OTHER
INFORMATION
None
REPORTS None

10. UNRESOLVED
ISSUES
None

11. USE CASE UC6 Make payment
Goal in Context Star Car Rental company makes profits.
Scope & Level Start Car Rental System, Primary Task.
Preconditions A customer has returned cars.
Postconditions The customer pays the total charge to the company.
Actors Customer, Staff : Primary
Bank : Secondary
Trigger The customer has returned the car.
DESCRIPTION Step Action
1 The customer has returned the car.
2 The company calculates the total charge (OI1, OI3).
3 The company mails the bill to the customer.
4 The customer receives the bill.
5 The customer pays the total charge by cash or credit card.
6 The company receives the money.
EXTENSIONS Step Branching Action
2a The customer accepts the collision damage waiver.
2b The customer pays a $1000.00 deposit to body damage.
1 The car has been damaged. The deposit is used to pay for
repairing.
2 The car has not been damaged. The deposit is returned to
the customer.
3a The company gives the bill to customer.
4a The customer has fines outstanding:
1 The customer pays fines for returning late.
2 The customer pays charge for repairing if he/she did not
receive the collision damage waiver (OI2).
4b The car has not been damaged.
The customer receives the $1000.00 deposit.
5a 1 The company receives the cash from the customer.
2 The company receives the money transferred from bank.
OTHER
INFORMATION
1 The damage waiver is $8.99 per day.
2 The customer declines the damage waiver. An insurance
policy with a $1000.00 deductible applies to body damage.

12. One Class Diagram And Six Sequence Diagrams
---Car Renting System
Jiaqi Xi
REPORTS None
UNRESOLVED
ISSUES
None

13. Class Diagram