ATM The System
Enter
BankComputer WithdrawMoney
Customer
DepositMoney
PrintLastTransaction
Printer
Use Case: Enter ID: 1 Brief Description: The system lets the customer access his/her account. Primary Actor: Customer Secondary Actor: BankComputer Preconditions: None. Main Flow: 1. The customer inserts his/her card into the card reader. 2. The system tries to read the card information. Alternative Flow: CorruptedCard 3. The system asks the customer to enter his/her PIN. 4. The system evaluates the entered PIN. Alternative Flow: Invalid PIN 5. The system shows a list of available options to the user. 6. The customer selects a transaction to perform. Postconditions: The customer has entered the system and is allowed to do a transaction. Alternative Flows: 1. CurroptedCard. 2. CancelOperation.
Alternative Flow: Enter: CorruptedCard ID: 1.1 Brief Description: The system informs the customer that the inserted card is not readable (Either it is curropted or belongs to another machine). Primary Actor: Customer Secondary Actor: BankComputer Preconditions: None. Alternative Flow: 1. The alternative flow starts after step 2 of the Main Flow. 2. The system pops up an appropriate error message on the screen. 3. The system returns the customer's card. Postconditions: None.
Alternative Flow: Enter: CancelOperation ID: 1.2 Brief Description: The customer cancels the operation. Primary Actor: Customer Secondary Actor: BankComputer Preconditions: The customer has asked for cancellation. Alternative Flow: 1. The alternative flow can start at any point during the Main Flow; as soon as the customer triggers the cancel command. 2. The operation stops. 3. The system returns the customer's card. Postconditions: None.
Use Case: WithdrawMoney ID: 2 Brief Description: The customer withdraws money from an account. Primary Actor: Customer Secondary Actor: BankComputer Preconditions: None. Main Flow: 1. The system asks the customer to choose his/her desired amount of money for withdrawal. 2. The customer enters the amount of money he/she would like to withdraw. 3. The system checks if there is sufficient amount of money to fulfill the customer's request. Alternative Flow: InsufficientCash Alternative Flow: 4. The system: 4.1. Counts the appropriate amount of money. 4.2. Dispenses the cash. 5. The customer takes the cash. Postconditions: None. Alternative Flows: 1. InsufficientCash
Alternative Flow: WithdrawMoney: InsufficientCash ID: 2.1 Brief Description: The system informs the customer that there is not sufficient money into the machine to fulfill the customer's request. Primary Actor: Customer Secondary Actor: BankComputer Preconditions: None. Alternative Flow: 1. The alternative flow starts after step 3 of the Main Flow. 2. The system informs customer that there is not sufficient money to fulfill the customer's request. 3. The system asks the customer if he/she want to perform another transaction. Postconditions: None.
Use Case: DepositMoney ID: 3 Brief Description: The customer deposits cash into his/her account. Primary Actor: Customer Actor: Secondary BankComputer Preconditions: None. Main Flow: 1. The system asks the customer to enter a destination account. 2. The system checks if the customer's request can be fulfilled. Alternative Flow: RejectDepositRequest 3. The system asks the customer to enter the amount to be deposited into the destination account. 4. The system checks if it can fulfill the customer's request. 5. The customer puts the cash into an envelope and return in to the machine. 6. The system accepts the envelope and logs all the events. Postconditions: The destination account no is entered to the list of creditors. Alternative Flows: 1. RejectDepositRequest
Alternative Flow: DepositMoney: RejectDepositRequest ID: 3.1 Brief Description: The system informs the customer that he/she cannot deposit money into the destination account. Primary Actor: Customer Secondary Actor: BankComputer Preconditions: 1. The destination account is locked. 2. The destination account does not exist. 3. The system [temporarily] does not accept deposit transactions due to the technical/security problems. Alternative Flow: 1. The alternative flow starts after step 2 of the Main Flow. 2. If the destination account is incorrect: 2.1. The system informs customer that the selected destination account is invalid. 2.2. The system asks the customer to correct the destination account. 2.3. The customer corrects the destination account. 3. Else if the destination account is blocked: 3.1. The system informs customer that the destination account is closed. 3.2. The system asks if the customer wants to perform any other transactions. Postconditions: None.
Use Case: PrintLastTransaction ID: 4 Brief Description: The system prints the last transaction. Primary Actor: Customer Secondary Actors: BankComputer, Printer Preconditions: None. Main Flow: 1. The system ...