Verification & Validation

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Presentation transcript:

Verification & Validation DATA . . . Verification & Validation

Objectives Keywords Identify types of data verification Identify types of data validation Explain the difference between data verification and validation Keywords Validation Verification Data capture Ms. Ngui Form 1 Term 2 1/2/2013

Data Verification Checking of data to ensure that it was accurately transcribed or copied from the original storage medium e.g. flash drive > > computer Two main : Visual checks Dual input Ms. Ngui Form 1 Term 2 1/2/2013

Data Validation Checking of data for errors before actual processing. Used to determine data inaccuracies, incompleteness and unreasonableness Some validation methods: Format check Parity check Length check Check digit Presence check Data ~ type check Range check Ms. Ngui Form 1 Term 2 1/2/2013

Summarize Verification Validation Checks to ensure data was accurately copied from the original storage medium into the computer Has 2 verification methods Checks data for errors before actual processing Has > 7 methods of validation Ms. Ngui Form 1 Term 2 1/2/2013

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