Validation and Verification
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Data validation what is it?
Ensure that only data that is permitted is accepted
Data verification is what?
Used to check that the data does not change as it is being entered
What is Range Check and what type of check is it?
Only accepts values in a certain range, Validation
What is format check and what type of check is it?
Checks that the data is in the correct format, Validation
What is length check and what type of check is it?
Checks that the data is the correct length of characters, Validation
What is Lookup Table and what type of check is it?
Looks up acceptable values in a table, Validation
What is Presence Check and what type of check is it?
Ensures that a field has not been left empty, Validation
What is Check digit and what type of check is it?
Additional digit added onto a set of numerical data which it is derived from in a way that can be replicated so it can be checked for errors, Validation
What are the 2 methods of data verification?
Double entry: Entering the data twice in order, if the computer detects the 2 entries and if they are different, an error message is displayed Proofreading data: Human proofreading the data. Very costly and time consuming.