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Pages:
3 pages/≈825 words
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Level:
APA
Subject:
Literature & Language
Type:
Research Paper
Language:
English (U.S.)
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MS Word
Date:
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Topic:

Use case (Research Paper Sample)

Instructions:

Task: Use Case analysis The sample is about use case in the ATMs

source..
Content:

Topic: Use Case
Name
Institution
Question 1
The use case gives a description of how a customer of a given bank can use the ATM to make withdrawals from his or her bank account. In this case, there are two actors in the sector, that is, the bank and the customer. This leads to having some preconditions for the activity or transaction to take place. Firstly, the there is a connection to the bank that is active. In addition, the ATM should have cash loaded in it.
There are different situations that may take place in the event of the transaction occurring. The process is systematic and logical. Failure to follow the steps will lead to unsuccessful; transactions in the end. The use case starts at the point when the customer of a given bank inserts their card into the ATM. There is the validation of the user is performed automatically by the ATM after this previous event. This leads to the machine giving a display of the various tasks that it can perform or offer at this point. Many a time, at this point customers do select the tab command button "withdraw cash." Then the ATM gives a prompt for an account from which the customer would like to make drawings (World Bank. 2010). 
The next stage requires the customer to select the correct account depending on the number and type of accounts owned. Then the ATM prompts for an amount the customer wishes to withdraw. After entering the amount, all the documents of the customer are sent to the bank in the form of a transaction. These documents include the PIN; card ID, amount that one wants to withdraw and the account from which the person is making the drawings. Then automatically, there is a response via the machine whether the transaction is successful or not. If it goes through, the card comes out and money dispensed. The aftermath of these events leads to printing of the receipts and the use case comes to successful completion.
There are cases however when a transaction may become unsuccessful. This is possible depending on how the customer feeds figures and data into the machine, for instance, at the point of validation of user. If the validation fails, then the use case ends with a total failure status. If the customer enters the wrong account number, the ATM shall display a message indicating that the account entered is invalid. Then the use case can resume from a later stage when prompted to do so (World Bank. 2010). 
Instances arise when the user accidentally enters the wrong withdrawal amount into the machine. This may be either too little amount that the machine cannot process since it is set to work in that like that, or too large figures. Such amounts make unsuccessful transactions for various reasons as read in the terms and conditions of the banking service providers. This includes for instance, amounts exceeding withdrawal limits required per transaction, or the daily withdrawal limits.. There may also exist a case in which the customer’s account has insufficient funds. All the cases outlined make the machine issue a warning message and indicate the amount one is capable of withdrawing. Therefore, the customer is goes a step backwards from where they can resume to complete the transaction (Bruegge, & Dutoit, 2010). 
There are moments when the customer receives no response from the bank. In this case, the ATM will retry a number of times, even up to three times. If this continues and still the machine does not elicit any response, the machine may display a message indicating unavailability of network or failure. At this point, the ATM automatically returns the card and indicates closure for the moment. Therefore, the use case ends with a condition of failure (King, 2012).
Illustration
lefttop1.0 Use case model1.2. Possible scenarios
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