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Bar codes

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Introduction

Elliot Zeff 12E3 AS Computing Homework - Research 2 1 (a). A bar code is a series of lines which differ in thickness and space in between each other which contain data to provide certain information on the product such as the Manufacturer, Product Description, and the Size. The purpose of the bar code is to simplify the amount of data which the staff needs to know and recognise by memory as all of the data is stored of the company computer. (b). Information that is contained in the bar code contains are the unique ID number which is the code number. (c). Information that is not contained in the bar code would be, in most cases, the price as all different shops which stock the product might need to charge different amounts. Also would be the manufacturers name, the product description, and the size and in some cases also the price as these would all be entered into the shops computer by someone. ...read more.

Middle

(d). The chip and pin process is used by a person inserting their card and putting in their pin code instead of signing the bill using their signature. When they have put in their pin code and pressed enter the computer will verify that the code that the person has entered is the same as the card code and if it is the transaction would of succeeded but it they got it wrong they will either have to do their signature or they will have to prove that their card is theirs or they could be charged with fraud. (e). After the payment has been made the supermarket computer will add all of the items bought to their reordering list so that the bulk order is read to put in once they have reached their minimum stock level. (f). ...read more.

Conclusion

6. (a). The manager can find out what stock needs to be re-ordered by checking what has been bought since the last time he checked and what ever has been bought then it would need to be re-ordered. (b). The human would check the re-order list before the order is placed to make sure that all of the items have been entered correctly and that no items had been left off the list. He also needs to verify the stock levels. 7. Stock on the shelves and in the warehouse might not match the stock file on the computer if stock had somehow been made unusable such as being damaged or if the product has expired or if the item has been stolen. 8. (a). Advantages to the supermarkets of using computers are that they will not lose any money by making human calculated errors, (b). disadvantages to the supermarket of using computers is that the supermarket will be totally dependant on the machines and also training would be needed. ...read more.

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