!!! Overview
[{$pagename}] represents a small piece of [business value] that a [Delivery Team] can deliver in an [iteration]. [{$pagename}] (and [Agile Tasks], often called features) break requirements into chunks for planning purposes. [Stories|User Story] are explicitly broken down until they can be estimated as part of XP's [Release Planning] process.[2]

While traditional requirements (like [use cases]) try to be as detailed as possible, a [{$pagename}] is defined incrementally, in three stages:
* The brief description of the need
* The conversations that happen during backlog grooming and iteration planning to solidify the details
* The tests that confirm the story's satisfactory completion

Well-formed [{$pagename}]s will meet the criteria of Bill Wake's INVEST acronym:
||Term||Description
|Independent|We want to be able to develop in any sequence.
|Negotiable|Avoid too much detail; keep them flexible so the [Delivery Team] can adjust how much of the [{$pagename}] to implement.
|Valuable|Users or customers get some [Business value] from the story.
|Estimable|The [Delivery Team] must be able to use them for planning.\\Small as Large [{$pagename}] are harder to estimate and plan. By the time of [Iteration Planning], the story should be able to be designed, coded, and tested within the [iteration].
|Testable|Document acceptance criteria, or the [Definition of Done] for the [{$pagename}], which lead to test cases.

!! Why Use User Stories?
Keep yourself expressing [business value]

* Avoids introducing detail too early that would prevent design options and inappropriately lock developers into one solution
* Avoids the appearance of false completeness and clarity
* Get to small enough chunks ([Agile Tasks]) that invite negotiation and movement in the [backlog]
* Leave the technical functions to the architect, developers, testers, and so on

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Write a Great User Story|https://help.rallydev.com/writing-great-user-story|target='_blank'] - based on information obtained 2016-12-08- 
* [#2] - [What is the difference between a UseCase and XP's UserStory?|https://martinfowler.com/bliki/UseCasesAndStories.html|target='_blank'] - based on information obtained 2018-10-26-