The Table 2 provides information to help understand these differences.
The Verification versus Validation section of the System Verification article gives fundamental differences between the two concepts and associated processes.
For each level, it is necessary to perform a set of final validation actions to ensure that features stated at preceding levels are not damaged.
Moreover, a compliant result obtained in a given environment can turn into a non-compliant result if the environment changes.
System Validation is a set of actions used to check the compliance of any element (a system element, a system, a document, a service, a task, a system requirement, etc.) with its purpose and functions.
These actions are planned and carried out throughout the life cycle of the system.