What is verification and validation?

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Verification: process of evaluating work-products of a development phase to determine whether they meet the specified requirements for that phase.

Validation: process of evaluating software during or at the end of the development process to determine whether it specified requirements.

Difference between Verification and Validation:

- Verification is Static Testing where as Validations is Dynamic Testing.
- Verification takes place before validation.
- Verification evaluates plans, document, requirements and specification, where as Validation evaluates product.
- Verification inputs are checklist, issues list, walkthroughs and inspection ,where as in Validation testing of actual product.
- Verification output is set of document, plans, specification and requirement documents where as in Validation actual product is output.

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