Transcription Errors, errors which occur when keying in data or completing optical mark forms, Data Processing errors, occurs during the processing stage for example Programming Error, Use of wrong data file, Incorrect formulas in spreadsheets, Virus Damage or Equipment Malfunction, Transmission Errors, An error that occurs when data is being sent over a network/the Internet, Transposition Errors, An error from a user typing in letters the wrong way round. E.g. from instead of form or filed instead of field or 10/5/18 instead of 5/10/18, Data Validation, a check performed by a computer program during data entry to ensure the data is both sensible and reasonable., Range Check, Ensures that the user is inputting data between two limits e.g. a quantity in an order database between 1 and 10., Length Check, Limits the number of characters in a data field. E.g to limit a telephone number (or ensure it is a certain amount of characters), Format Check, Ensures a data field is structured in the desired way, e.g National Insurance Number, Data Verification, Checks that data being entered into the computer exactly matches the source of the data, Methods of Data Verification, Double entry of data, Sending back printouts

AS ICT Validation & Verification Key Terms

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