The terms “Validation” and “Verification” sound very similar. In systems engineering they are used in a distinct manner. The definitions for both are found below:
Verification - The process of demonstrating that a system fulfills specifications and requirements. It answers the question: Did we build the system correctly?
Validation - The process of demonstrating that a system provides the value intended (capability) and meets the original needs defined in the ConOps. It answers the question: Did we build the right system?
In almost every case, verification of the system comes first followed by validation by the users. You may encounter the term “in-process validation”, this concept validates the stages in the life cycle process as they are completed with the other completed stages.
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