• A storyboard is used to describe the screens used in a project, together with how each screen interacts with other screens.

• Effectively, a storyboard for a software product is 
• a collection of screen designs together with descriptions
• a diagram describing the links between the screens (Navigation Map)
• (Note: this is also covered in 12 IPT Hypermedia Storyboards)

Interface design

For an overview of interface design best practice read this article.