Validation / Verification

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Verification
Character Check
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This is a validation check that ensures no letters have been entered into a field marked "quantity" or no numbers have been entered into a field marked "name"
Length Check
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Most field will have a maximum length and some have a minimum. Telephone numbers for example would be subject to both
Range Check
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This would apply to numerical fields, allowing them maximum and minimum values. Fields containing prices or quantities might have this type of check.
Lookup
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This ensures data is valid, the user might select a value from a list rather than typing.
Presence Check
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simply checks that something (anything) has been input
Type Check
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This check the appropriate data type (number, date, etc.) was adhered to.
Verification
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Double entry
This is where the same data is entered twice, often by two different operators.If the two entries don't match, they must be re-entered twice
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Check digits
This is used when you want to be sure that a range of numbers has been entered correctly. For example a bar code of an ISBN number.
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This technique will then check the final number in the sequence before the computer performs a complex calculation on all of the numbers to compare the answer to the final number. If both match, it meas data has been entered correctly.
Screen validation
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After data has been entered, the user is presented with a screen showing the entered data, offering a chance to visually check and correct any errors.
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Other cards in this set

Card 2

Front

This is a validation check that ensures no letters have been entered into a field marked "quantity" or no numbers have been entered into a field marked "name"

Back

Length Check

Card 3

Front

Most field will have a maximum length and some have a minimum. Telephone numbers for example would be subject to both

Back

Preview of the front of card 3

Card 4

Front

This would apply to numerical fields, allowing them maximum and minimum values. Fields containing prices or quantities might have this type of check.

Back

Preview of the front of card 4

Card 5

Front

This ensures data is valid, the user might select a value from a list rather than typing.

Back

Preview of the front of card 5
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