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Introduction
As an intern software developer for a retail bank, you have been tasked with developing use cases to support the ATM service.
Body
• Describe a use case, complete with typical and alternate courses, that documents the event of a bank customer withdrawing money from an ATM. Illustrate the use case using Visio or a similar product.
This use case describes how the Bank Account Holder uses the ATM to withdraw money his/her bank account. The actors are the Account Holder and the bank. Some of the preconditions that already in us is that: (1) there is an active network connection to the Bank; and (2) the ATM has cash available.
In this use case the basic flow of events consists of the following: (1) The Account Holder places card in card slot; (2) the system prompts Account Holder for PIN; (3) the Account Holder enters in PIN; (4)the system verifies the card and PIN are valid and prompts user to select a transaction; (5) the bank customer selects an account; (6) the Account Holder selects Withdrawal; (7) the system retrieves account information and prompts account holder for amount to withdraw; (8) the Account Holder enters the amount; (9) the system verifies that there is enough money in the account to support the withdrawal; (10) the system verifies there is enough cash in the machine to support the withdrawal and replies with a go/no go reply telling if the transaction is ok; (11) The system reduces the account by the amount requested and dispenses money to the Account Holder; (12) the card is returned to the Account Holder; (13) the receipt is printed; and finally; (14) the use case ends successfully.
Alternate Course: Card Rejected. In this course flow of events are alternative for steps (5) (6) (7) in above typical course. They consist of following: (5) the system determines that the card or PIN is invalid; (6) the system displays an error message

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