Bank customer inserts debit card and enters PIN.

Customer is validated.

ATM displays actions available on ATM unit. Customer selects Withdraw Cash.

ATM prompts account.

Customer selects account.

ATM prompts amount.

Customer enters desired amount.

Information sent to Bank, inquiring if sufficient funds$/$allowable withdrawal limit$.$

Money is dispensed and receipt prints.

Alternative flows

$2$a$.$ Customer is not validated.

$2$a$1.$ ATM displays error message.

$7a.$ Customer selects invalid amount.

$7$a$1.$ ATM prompts user to re$-$enter valid amount.

$8$a$.$ Customer has insufficient funds.

$8$a$1.$ ATM displays error message.

$8$a$2.$ ATM shows available withdrawal limit$,$ redirects to step $6.$

$9$a$.$ATM has insufficient cash.

$9$a$1.$ ATM Technician is alerted.

$9$a$2.$ ATM displays error message and phone number to call.

$9b.$ Cash gets stuck in dispensing.

$9$b$1.$ ATM displays error message.