Example of Agile Requirements Capturing

In software development it is often not until the users have something in their hands, have been shown or given something, some kind of tangible outcome, software, screen with links to a dummy content, etc, before they only begin to realise what they actually need. The requirements are painstakingly being elicited from them and gradually narrowed down to a form that would be satisfactory for their purposes. It might be rather a long process and end users need to be fully involved right from the start of the project.