validation

=__**Validation**__= Validation is the process by which data that has been input to a computer is assessed to ensure that it is correct and complete. Sometimes errors can occur during input, resulting in inaccurate data. A method of identifying errors is to ensure that both manual and electronic validation techniques are in place. Manual validation requires the data entry operator to proofread the data that they have entered to ensure its accuracy, completeness and reasonableness. a check for reasonableness means checking for data that falls within normal or expected parameters.