Implied in User Driven Design is software.
Some sort of tool to help the user find something they want through interactions.
Of course once that interaction is complete you still have to produce it and get it to them.
Here is a cool short video of a talk by Mint Digital (whom I have been working with a ton in the last year) on just that step. Get the physical into the customers hands.
In this case it’s instagram pics to fridge magnets.