= Scrum =
Software development methodology.

== User story ==

=== Agile modeling ===
http://www.agilemodeling.com/artifacts/userStory.htm

User stories are very slim and high-level requirements artifacts.

As a (role) I want (something) so that (benefit).
 * Students can purchase monthly parking passes online.
 * Parking passes can be paid via credit cards.
 * Parking passes can be paid via PayPal.

=== Extreme programming ===
Deliver the software you need as you need it. 

Extreme Programmers constantly communicate with their customers and fellow programmers. 

http://www.extremeprogramming.org/rules/userstories.html

User stories should only provide enough detail to make a reasonably low risk estimate of how long the story will take to implement.

When the time comes to implement the story developers will go to the customer and receive a detailed description of the requirements face to face.

You should try to keep stories focused on user needs and benefits.