It is this idea of rapid prototyping and flexibility in the plan (as demonstrated by our fearless youth in the marshmallow challenge) that yields the greatest chance for success.

FORBES: The Exponential Rise of Lean Business

The fact that it has been comparatively rapid is a reflection of the durability and flexibility of our democracy.

CNN: How gay rights went mainstream

The ability to use fuels other than petroleum is critical to our energy security because it will increase our flexibility and reduce the services' vulnerability to rapid and unforeseen changes in the price of oil.

WHITEHOUSE: Advancing National Security Through Energy Security