Data verification (數據校驗)

- This involves double entry or independent entry by two different operators.

Validation數據有效性檢驗

- This ensures that the input data are acceptable (接受) and reasonable (合理) by validation programs. (有效性檢驗程序)

Type of validation check

• Presence Check (存在檢查) - used to ensure that all the data items are present


• Length Check (長度檢查) - used to ensure the correct number of characters or digits in a data items.


• Range Check (範圍檢查) - ensure that the data lie within a certain range.


• Type check (類型檢查) - check the type of data is correct


• Check digit (檢查數位) - An extra digit is added to ensure the correctness of the codes


• Control Total(控制檢查總計) - Ensure that there is no loss of records before data processing in computers.