AS-IT-REVCH#01

​Students should understand and revise:
What is data?

What is Information?

What is Knowledge?
Factors that affect the quality of

information
Encryption
Checking the accuracy of data
Methods (batch, online, real-time)

​Look up Check as data enterd in cell with rule and data is compared to entries in table

​The computer searches for the bar code number 5022476130067 in the product file When the matching record is found, the number in stock, 131, is reduced by one to 130 The number in stock, 130, is now compared with the re-order level, 130 If the number in stock is equal to the reorder level… … which it is, then the computer creates an order automatically The computer reads the reorder quantity, 250, needed for the product It reads the supplierID, B671841, for Oaters It searches the supplier file for the record corresponding to the supplier ID, B671841, read from the Product file The order/e-mail is automatically sent to the supplier… …using the supplier’s contact details from the Supplier file, js@cmail.co.ke