Data Validation and Verification
- Created by: Amelia Cantwell-Hyde
- Created on: 06-12-14 16:23
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- Data Validation & Verification
- Verification
- Is used to ensure that the data that appears in a document or database is the same as the original source data on the data capture sheet
- Visual Checks (a.k.a double entry)
- Where two people enter the same data separately
- Proofreading
- The reading, by people other than the author, of documents to check for factual and other errors
- There is usually no reference to original data
- Validation
- Is the process carried out by a computer to check that the data being entered into a computer is acceptable and reasonable according to certain rules
- Presence Check
- Checks that data has been entered
- e.g. A name has been entered
- Range Check
- Checks that the data is within a set range
- e.g. A date is between 3rd March and 22nd October
- Check Digit
- Checks that the data is allowed or can exist
- e.g. Barcodes are correct
- Format/picture
- Checks that each of the characters is allowed or in the correct position
- e.g. Checks an email address - e.g. [email protected]
- Length
- Checks that the correct number of characters has been entered
- e.g. A postcode has 8 characters including the space - e.g. CB33 8XY
- Existence
- Checks that the entry matches stored data
- e.g. An employee number exists exists in a list of employees
- Verification
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