Verification in a system life cycle context is a set of activities that compares a product of the system life cycle against the required characteristics for that product. This may include, but is not limited to, specified requirements, design description and the system itself.
Validation in a system life cycle context is a set of activities ensuring and gaining confidence that a system is able to accomplish its intended use, goals and objectives.
*ISO/IEC/IEEE 29148:2018
*by intuition
System has been built right
The right system has been built
ISTQB definition:
The testing of individual software components
Method:
White-box
Who:
Software Engineers
ISTQB definition:
Testing performed to expose defects in the interfaces and in the interactions between integrated components or systems.
Method:
White-box or Black-box
Who:
Software Engineers or independent testers
ISTQB definition:
The process of testing an integrated system to verify that it meets specified requirements.
Method:
Black-box
Who:
Normally, independent testers
ISTQB definition:
Formal testing with respect to user needs, requirements, and business processes conducted to determine whether or not a system satisfies the acceptance criteria and to enable the user, customers or other authorized entity to determine whether or not to accept the system.
Method:
Black-box
Who:
User or Customer