Verification and validation are two essential concepts in software testing that focus on different aspects of ensuring software quality. Here are the differences between verification and validation:
Verification:
Definition: Verification is the process of evaluating the software system or component to determine whether it meets specified requirements or specifications. It involves reviewing and inspecting the work products produced during the development process to check for consistency, completeness, and correctness.
Objective: The main objective of verification is to ensure that the software is being built correctly and according to the specified requirements.
Activities: Verification activities include various techniques such as reviews, walkthroughs, inspections, and static analysis. It involves analyzing documents, source code, design models, and other artifacts to identify defects, inconsistencies, or non-compliance with standards.
Focus: Verification focuses on the software development process and adherence to predefined requirements, standards, and guidelines. It is concerned with building the product right.
Validation:
Definition: Validation is the process of evaluating the software system or component during or at the end of the development process to determine whether it satisfies the specified business requirements and user needs. It involves executing the software and checking its behavior against the user's expectations.
Objective: The main objective of validation is to ensure that the software meets the customer's needs and functions correctly in its intended environment.
Activities: Validation activities include dynamic testing techniques such as functional testing, system testing, integration testing, and acceptance testing. It involves running the software, providing input data, and comparing the actual output with the expected results.
Focus: Validation focuses on the end product and its suitability for the intended use. It aims to demonstrate that the product meets the customer's requirements and solves their problems.
In summary, verification is concerned with confirming that the software is built correctly and according to specifications, while validation is focused on ensuring that the software meets the customer's needs and functions correctly in its intended environment. Verification activities emphasize the development process and adherence to requirements, whereas validation activities involve testing the software's behavior and functionality to ensure its suitability for use.
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