Epic

A large or complex feature that should be broken into several user stories:

  • Two-Factor Authentication
  • Password Expiration
  • Account Suspension

Story

A use-case describing a desired behavior and its business value:

AS A [person/role who will benefit],
I WANT [some product or service to behave in a particular manner],
SO THAT [some benefit or value is provided].

Scenario

A story’s acceptance criterion, to be implemented as an executable test, described using Gherkin:

GIVEN [some initial context],
WHEN [an event occurs],
THEN [ensure some outcomes].