Validation is a process which demonstrates that the product is able to accomplish its intended use in the intended operational environment. The status of the product following validation is "validated
". Verification is a pre-requisite for validation.
A valley (also called a vale, dale, glen or strath and near or in Appalachia, a draw) is a depression with predominant extent in one direction. [Wikipedia]
Long depression running from a higher level to a lower level (or to the coast), with a glacier completely filling the feature, partly filling it or terminating with it; rarely a valley may be ice-free
with a seasonal stream running through it