Validation – To prove that something works. E.g. “Has this gone through validation yet?”
Value-added – Something that increasing the worthwhile nature of something. E.g. “This new cash register system is a value-added asset.”
Vetting – Checking. E.g. “Has this vendor gone through the vetting process?”
Visio – An electronic diagram showing a process, usually produced the Microsoft® Visio® application. E.g. “Can you get me a Visio showing the process?