What is verification what is validation

The systems engineering life-cycle model may be described differently by MITRE's government sponsors. This DoD Figure 1, as depicted in Engineering for Systems Assurance , Ver. Regardless of the life-cycle model our sponsors use, they all track to three basic systems engineering stages: concept development, engineering development, and post-development. Each of these engineering stages may be separated into supporting phases.

The concept development phase is critical because it describes the ultimate operational requirements that will be used to "validate" the ultimate material solution. The supporting system, subsystem, and component level specifications leading to preliminary design and critical design will be iteratively verified through various types of testing and analysis during materialization, integration, and testing.

Verification is the critical feedback element that confirms the specifications were satisfied. Improve Article. Like Article.

Prerequisite — Verification and Validation Verification is the process of checking that a software achieves its goal without any bugs. It is the process to ensure whether the product that is developed is right or not. It verifies whether the developed product fulfills the requirements that we have.

Verification is static testing. Verification means Are we building the product right? Validation is the process of checking whether the software product is up to the mark or in other words product has high level requirements. It is the process of checking the validation of product i. Verification reduces the chances of failures in the software application or product. Verification helps in building the product as per the customer specifications and needs.

What is Validation? Advantages of Verification: During verification if some defects are missed, then during the validation process they can be caught as failures. If during verification some specification is misunderstood and development has already occurred then during the validation process the difference between the actual result and expected result can be identified and corrective action taken. Validation is done during testing like feature testing, integration testing, system testing, load testing, compatibility testing, stress testing, etc.

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