What if you could test out a solution before it was implemented, and be able to make important corrections before a substantial amount of time or money was invested?

There is always uncertainty as to whether a new change, intervention or design will actually do what is desired.  New changes to a system can have unexpected problems and unanticipated effects.

Prototypes–representative or actual models of a product, space, process, piece of software, or interactive systems change–can be used to collaboratively test feedback loops, increase understanding, explore design alternatives, and uncover potential challenges before they occur through implementation.  

Prototype creation and exploration can also increase the psychological ownership of change activities among stakeholders, while simultaneously reducing ambiguity and uncertainty.