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Data Errors - Coggle Diagram
Data Errors
Problems of Data Errors
Time spent sorting out mistakes
Loss of goodwill
Goods sent to the wrong address
Loss of trust
Incorrect decisions being made resulting in loss of money
Places where errors can occur
Processing
Errors can occur due to incorrectly written software. This could cause calculations to be worked out incorrectly, or the wrong record could be updated in a file
How to Combat Processing Errors
A backup regime ensures that if a file is corrupted or lost, it can be recreated in its original form
Data Entry
Many errors occur when data is originally captured on paper. A common mistake is to enter a date of birth with the current year
How to combat Data Entry Errors
This type of error can be reduced by careful consideration when designing the form
Found in
Application forms
Order requests
Details of car repairs undertaken
Transmission
Data that has been entered correctly in a system can become corrupted when it is transmitted within a computer or when sent from one computer to another.
Reasons & Results of Transmission Errors
A poor connection or electronic 'noise' on the line
Data corruption where one or more zeros are written as ones, or ones are written as zeros. The resulting string of bits would be interpreted as another character
How to Combat Transmission Errors
A parity check is an extra bit that is added on to a group of bits used to check that the other bits have not been corrupted
Transcription
Whenever data is copied manually there is a chance that mistakes will be made
How to Combat Transcription Errors
The use of automatic data entry, e.g. using barcode readers at a supermarket checkout
The person doing the copying may misread the date