Storm the brain
Mostly we are approached with great ideas about functionalities of the software we are ought to produce. Rarely these visions are on paper. Predominantly these ideas are in the mind of some ingenious mastermind.
It is about us to drag these ideas to a use case driven specification. We know how to iteratively derive from a chaotic brainstorming session to a structured way of absorbing your ideas into a meaningful catalogue of requirements. Use our knowledge to arrive at better software.