Validation might be done a split test or by a customer usability test or by cohort analysis.

FORBES: Lean Startups Pt 4: Using Kanban To Validate Innovation

We can test for safety and usability for all manner of personal electronic devices that might get used on an airplane.

CNN: Boeing uses potatoes for in-flight wireless test

What type of policy do you have that allows me to test this to see if all these features and the usability really works for what I'm going to need it for.

NPR: Tips for Fighting Technology Overload