What is the difference between validation and verification?

Verification is the process of ensuring that a software application achieves its goal without any bugs. It is the process to confirm whether the product that is developed is correct or not. It verifies whether the developed product fulfills the requirements that we have. Verification is static testing. Verification means asking whether we are building the product right.

Validation is the process of ensuring whether the software product meets requirements. It is the process of checking the integrity of the product, or in other words, it checks what we are developing is the right product. Validation is a dynamic testing technique that helps determine if the actual and expected products match.

The distinction between validation and verification is mainly due to the differing roles of specifications. Validation is the process of checking whether a specification captures customer requirements. Verification is the process of checking whether the software meets its specifications.

Verification includes all the activities associated with producing high-quality software, from designing and implementing the system to testing and debugging it. Validation is judging whether a proposed system addresses a real-world need. In contrast, validation is a highly subjective process that involves subjective assessments of how well the proposed system meets those needs.