What is Design Validation?
A post hoc evaluation ensures that the design has identified essential functions and elements in the user analysis. Testing the correspondence of the design with the actual needs of the end users.
Design verification is a testing process by which you verify that the device you build performs the intended function for the end user. The design validation is evidence that device specifications are consistent with user needs and intended use.
System validation is a set of actions used to check the compliance of any element (a system, a system element, a task, a document, a service, or a system requirement, etc.) with its purpose and functions. These actions are planned and implemented throughout the life cycle of the system. Throughout the system development cycle, the validation process is performed in parallel with the system definition and system realization processes and is applied to any activity and product resulting from this activity.