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verification vs validation

This page on verification vs validation describes difference between verification and validation. Both the terms are applied to software product testing.

verification refers to processes involved in the development of the software product. It answers the question "Are we building the product right?" means are we following processes correctly to achieve the goal set.

validation refers to validating the product's progress over time. It answers the question "Are we building the right product ?" means are we completing the features finalized at the start of the product development.

In the other way,verification is the process of determining whether software artifacts fulfill the requirements or conditions imposed on them in the previous phases. It can be considered as a process related activity. Verification activities also ensure that throughout the phases whether the product is built as per the standards and project plan.

Validation is the process of determining whether requirements and the final as built system or software fulfils its specific intended use. It can be considered as a product related activity. Quality audit and review are considered as verification activities. IEEE defines validation as the process of evaluating a system of a component during or at the end of a development process to determine whether it satisfies the specific requirements. For example, testing is considered as one of the validation activity.

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