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| Question | Answer |
| Verification and Validation are independent (seperate) procedures that are used together for checking that a product, service, or system meets requirements and specifications and that it fulfills its intended purpose. | It is sometimes said that validation can be expressed by the query "Are you building the right thing?" and verification by "Are you building it right?" |
| Validation and verification are two ways to check that the data entered into a computer is correct.Validation is an automatic computer check to ensure that the data entered is sensible and reasonable. It does not check the accuracy of data. | For example, a secondary school student is likely to be aged between 11 and 16. The computer can be programmed only to accept numbers between 11 and 16. This is a range check.However, this does not guarantee that the number typed in is correct. For example, a student's age might be 14, but if 11 is entered it will be valid but incorrect. |
| Verification is performed to ensure that the data entered exactly matches the original source. | There are two main methods of verification: 1.Double entry - entering the data twice and comparing the two copies. This effectively doubles the workload, and as most people are paid by the hour, it costs more too. 2.Proofreading data - this method involves someone checking the data entered against the original document. This is also time consuming and costly. |
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