IGCSE ICT Stock Control. Understand the need for and use of automated stock control systems Be...
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Transcript of IGCSE ICT Stock Control. Understand the need for and use of automated stock control systems Be...
![Page 1: IGCSE ICT Stock Control. Understand the need for and use of automated stock control systems Be able to discuss the advantages and disadvantages of.](https://reader035.fdocuments.us/reader035/viewer/2022062409/5697bfe01a28abf838cb37d2/html5/thumbnails/1.jpg)
IGCSE ICT
Stock Control
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U nderstand the need for and use ofautomated stock control systems
Be able to discuss the advantages and disadvantages of automated stock
control systemsUnderstand the role of the check
digit as a form of validation
The syllabus says you must:
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Stock control : the old way
Price labels were handwritten and stuck on manually
Staff/time/costLabels could be
misread/changedYearly stock-check:
closed for business
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The problems
SlowCostlyRequired many staff Impact on revenueAccuracy?Lost revenue through
wrong or misread labelsLost revenue through
stock-taking closures Stock control done by
guesswork
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The technology behind ASCS
ASCS rely on barcodesBarcodes allow quick identification of
product details when the barcode is scanned
The barcode reader scans the barcode using a laser
It retrieves the price and the details from the database
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What’s in a bar code? 1
Bar codes are made of alternating dark and light lines of varying thickness
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What’s in a bar code? 2
The barcode contains data about the type of product, size, manufacturer and the country of origin.
It also contains a check digit, so that the computer can validate that the data has been read in correctly.
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What’s in a bar code? 3
The barcode does not contain price . The price is held in the database instead .
This makes it easy to change if there are special offers or prices go up . Imagine if the price was part of the barcode . Every time the price changed, you would have to replace all of the packaging .
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What’s in a bar code? 4
Once the barcode has been recognized by the database and the price found, the data is sent from the central computer to the till (Electronic Point of Sale - EPOS).
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The check digit
The check digit is a form of validation It is used to ensure no errors occurred
when the barcode was read inThere are a number of ways of
calculating check digits depending on how many digits there are in the barcode
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This method works for codes with 11 digits:
Add the digits in the odd positions, multiply by 3(5+0+3+1+0+7=16 16x3=48)
Add the digits in the even position: 1+4+1+2+1=9
Add the two together: 48 + 9 = 57 Check digit is 3 (needs to be added to make next
multiple of 10). Checked every time a bar is scanned!
5 1 0 4 3 1 1 2 0 1 7
2 1 4 4 6 1 88 10 even digit positions
1 1 3 4 5 1 7 2 9 1 11 odd digit positions
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Where are bar codes used?
Library book systemsAdministration systems (eg
hospitals)Passport & ID card systemsEquipment checking systems (eg fire
extinguishers)Automatic stock control systems
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Sequence of events 1
1. Barcodes on all items: each is associated with a stock file holding details of price, stock level, description etc.
2. Customer goes to checkout: barcodes scanned
3. Stock file is searched, record by record, until a match is found
4. Appropriate record is accessed5. Price & description sent to EPOS6. Stock level reduced by 1: new stock level
written to file
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Sequence of events 2
If new stock level is = or 1 less than re-order quantity, new batch is automatically ordered
Flag assigned to item to indicate order (stops re-order being made for EVERY purchase!)
This is repeated for every item in basket/trolley
Itemized bill given to customer Loyalty card updated/takings file updated Barcodes on cartons of new goods used to
update stock file & flags removed
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Advantages & Disadvantages
Advantages Accuracy Speed Optimum stock levels Patient safety Equipment safety Analysis Automatic re-
ordering Automatic scheduling
of updates etc
Disadvantages Cost Training Over-reliance on
technology
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Today’s assignment:
Download the file Electronic Fund Transfer Simulation
Enter some purchases and look carefully at the following: Banking/EFTPOS data Stock levels Receipt
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Read the information at http://
communication.howstuffworks.com/how-
inventory-management-systems-work.htm
Homework
Go to www.edmodo.com and complete the homework assignment.