Data Validation and Verification Review

Transcription error: typographical mistakes/ the wrong character- letter or number was entered

Transposition error: the characters- letters or numbers were interchange or put in the wrong place

Double entry

Proofreading

Print a copy of the data and comparing with original paper document 

A second person read the input data while the first checks against the original document 

Checking the data on the screen against the original paper document

Data type This check ensures that data entered is of a specified type before it’s accepted

Range Check: check ensures that data entered fits within a particular range.

Consistency Check: ensures that data in one area cross references logically with data from another area

Presence Check: This check ensures that data is actually entered in a field and it is not left blank.

Parity Check ¨This check ensures that data is not adjusted (via electrical interference) during transmission...

...It adds an extra bit (0 or 1) to make the total number of ones (in a byte) odd or even.