Data & Information
Complete
All necessary information must be given
Control Totals
Are batch Totals that have meaningful value.
Hash Totals
Are batch Totals that have no other meaning.
Presence
Checks to reject a group of data where required fields have been left blank.
Accurate
Correct
Double Data Verification
DDE
Data
Data is raw facts and figures coded and structured for subsequent processing, generally by a computer system. It is meaningless until placed in the correct context
Relevant
In order for information to be useful it must be relevant to you.
Information
Information is data that has processed into a form that has meaning and is useful. This data has been put in a context and can be understood.
The difference between data and information?
Information is in context, data is not.
Reliable
Is the source of the information reliable.
Knowledge
Knowledge is the understanding placed on information. The consequences associated with facts and applying information to make decisions.
Effectively presented
Organise your information and present it in an organised way.
Raucer
Relevant, accurate, up to date, complete, effectively presented and reliable.
Explain how an error will be detected using a modulus 11 check digit.
The customer number is entered, the system calculates a check digit. The calculated check digit is compared to the check digit that is keyed in. If they are different an error is flagged. The customer would be asked to rekey their ID.
Batch Totals
The total value of one or more fields in a batch of data. It is calculated in advance and then compared with the total as calculated by the computer.
Verification
The use of checks to make sure date is consistent and has not been corrupted. It confirms the integrity of the data when copied.
Proof Reading
The user reads data after it has been entered to ensure accuracy
Check Digits
These are extra digits added as part of a numeric data item, to allow a verification check to be made.
Type
This checks to ensure a data item is of a particular data type.
Format
This checks to ensure a data item matches a previously determined pattern.
Length
This checks to ensure that the data entered is of a reasonable length.
Lookup
This checks to ensure that the data matches one of a limited number of valid entries.
Range
This checks to reject any data outside an expected range.
double data verification
This ensures data is typed into a computer system accurately.
Up To Date
To be useful; information needs to be up to date
Validation
Validation is the automatic checking of data entered into a computer system.
GIGO
garbage in, garbage out