Creating User Stories for Agile Projects
A user story is a feature request (or need) expressed from the point of view of a user with a description of the value it provides to that user.
Web Design and Development Magazine
Web Design and Development Magazine
Tag software design
Traditional and Modern Software Development Life Cycle Methodologies
If the requirements are not clear or unknown at first, an agile approach will help the team understand the needs of the users while delivering incremental updates and gathering feedback from the market.