GoGreen Bikes Required System
GoGreen Bikes is a bicycle hire company. The new system for keeping track of bike hiring will work as follows:
A customer goes to the reception desk and asks for the type of bike they want to hire e.g. a woman’s ten speed racer in blue. The receptionist relays this information to one of the mechanics who brings out a suitable bike from the store room. The receptionist checks the bike number and looks up the details of this bike on the computer system to find the hire and deposit charges. If the customer accepts the cost of the hire the receptionist records customer details such as name, address and telephone number. She also records details about the hire transaction such as the start date, estimated number of days required and the bike number. The deposit and hire charge are paid by the customer and the system prints out a receipt. The customer then takes the bike and departs.
For each customer, an account is kept of the amount charged and the amount paid. Recording such details is also the job of the receptionist.
When the bike is returned, the customer tells the receptionist his or her name. The records are checked to see that they correspond with the bike that is being returned. The date of return is also checked; if the return is late, the customer is required to pay an extra charge.
The bike is then examined by a mechanic to check for any damage. If the bike is in good condition, the mechanic records this on the system and the receptionist returns the deposit to the customer.
Details of new bikes are recorded on the computer by a clerk.
Additional functionality:
· The system should keep a record of all customers and their past hire transactions.
· Keep track of how many bikes a customer is hiring so that the customer gets one receipt for all bikes hired.
· Cope with a customer who wants to hire bikes for different lengths of time.
· Automatically work out any extra payments due for bikes that are returned late.
· Keep track of the state of each bike e.g. in stock, hired or being repaired.
· Provide the means to record details about specialist bikes e.g. tandems and penny farthings that are also available for special occasions.
Procedure for building Class diagram
1. Identifying the objects and deriving classes
List of nouns:-
· GoGreen Bike
· Bicycle
· Bike
· Customer
· Bike number
· Hire
· Deposit charge
· Records
· Name
· Address
· Telephone number
· Hire transactions
· Start date
· Estimated number
· Receipt
· Account
· Date of return
· Deposit
· Past hire transactions
· Length of time
· Stock
· Specialist bike
· Cost of hire
2. Identifying attributes of classes
List of attributes:-
· Bike number
· Deposit charge
· Bike size
· Bike model
· Name
· Address
· Telephone number
· Start date
· Estimated number
· Bike status
· Date of return
· Deposit
· Past hire transactions
· Length of time
· Tandems
· Penny
.cost of hire
3. Idendifying relation between classes
--Assosiation and multiplicity
--Aggregation
--Inheritance
--Final class diagram
