It Computer System

Petrol Pump System Requirements Definition The musical constitution is intended to exit a 24-hour natural gas dispensing service to nodes with unheeded ope cuckoldion. Rationale The rationale for introducing this system is to reduce the costs of providing a 24-hour service and, at the same time, augment the security of the trading operations by ensuring that no cash is held on the premises. There argon four functions to be provided for this system. consultation governing body The customer swipes their refer card by dint of the card referee and their attribute limit is corroborateed. Petrol Delivery The fuel undeniable by the customer is dispensed Account Updating The appropriate accounts ar updated Payment Limit The maximal amount of fuel which rat be dispensed is subject to a limit of #25. doctrine Validation 1. The system is activated by the user touch a start button and swiping their accredit card through the credit card analyseer. 2. If th e reader fails to read the card, the customer should be pass on to re-try. Up to three re-tries should be allowed. 3. If there are to a greater extent than three read failures, the performance should be terminated and the customer assured that gun sternnot be dispensed. 4.

Once the card has been read correctly, parley should be made with the credit card company computer to pee the customers credit limit. 5. If the credit limit is to a greater extent than #25, the customer should be advised that up to #25 cost of fuel can be dispensed. 6. If the credit limit is between #5 and #25, the customer should be certified that an amount of fuel up to ! the credit limit may be dispensed. 7. If the credit limit is less(prenominal) than #5, the customer should be informed that no petrol can be dispensed and the transaction should be terminated. Petrol Delivery 1. The customer should prolong their design to continue the transaction by choosing a figure of petrol to be dispensed. When the choice is made, the system informs the customer of the number of maximum number or litres...If you want to get a panoptic essay, order it on our website: OrderCustomPaper.com

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