Download Software Engineering I Homework 1 Name: Aisha Al

Software Engineering I
Homework 1
Name: Aisha Al-Anssari
ID:200800271
Sec: 201
Q1) Requirements Specification
Every developer need to requirement specification to create a software. In
this paper we describe requirement specification for ATM system, and
developer discuss and specify the purpose with end users. ATM system
must allow users who have account in a bank to check their balance,
deposit money, withdrawal money, transfer money and bill payment.
Supported activity list
1. allows user to log on
2. allow users enter their password
3. Validate bank card and PIN
4. allows user withdrawal cash
5. allows user transfer money
6. allows user to get balance information
7. ability to print bill balance
8. check expiry date for bank’s card
9. connect ATM system with bank database
10. ability to check that the account is not locked
Human-computer interface description
1. new customer must be able to use the interface without any help
2. the interface request to choose the language
3. request to enter PIN by numeric keyboard
4. the interface must be Secured to hid the password
5. view menu
6. end screen to show that if process was successful or failed
solved problem list
1. users able to contact with their account any time for 24 hours and
everywhere
2. users able to access their account without visit any bank building
3. ATM system faster, more comfortable and flexible for bank costumers
Security and fault-tolerant requirements
1. The system must be sensitive to check errors
2. Enter unsuccessful password three times will lock the account
3. Limited amount of money withdrawn per day
4. Allow users to change their PIN only first time of use card
5. There must be emergency call
Information source list
1. Bank staff
2. Bank customers
3. Online research resources
Ethical concerns list
1. Each customer must have privacy for their information
2. Privacy for costumer’s account, balance and banking dealing
Checks and balances
1. Check for 4 digit numbers
2. Check for available account
3. Check for Validate bank card and PIN
Q2) list of primary classes for ATM system
1. Bank customer (full name, ID, phone number, address, P.O.Box,
E-mail, account number)
2. ATM system (check balance, deposit money, withdrawal money,
transfer money and bill payment, calculate balance, Validate bank
card, card expiration date and PIN)
Q3) Create two key use cases for ATM system
1. Use case: withdraw cash
Precondition: user must have an account in the bank, and system must
be validated.
Main flow of events: bank customer should insert his/her card in ATM
machine, choose language then ATM system requesting for enter PIN,
screen will view menu with some options like view account balance,
withdrawal money and transfer cash. User choose withdraw cash,
screen show another menu of amounts of money to withdraw it or user
can select other to enter different amount. User select from the menu
1000 SR, then system show massage to confirm or cancel then user
confirmed the procedure.
Post condition: account is debited by the amount of withdrawal.
Exceptional: bank card is expired
2. View account balance
Precondition: validated bank card and validated PIN
Main flow of events: bank customer should insert his/her card in ATM
machine. Then choose language then ATM system requesting for
enter PIN. screen will view menu with some options, user choose view
account balance. System shows user account balance then ask if user
want print the bill.
Exceptional: user enter wrong password three times