Theme, Initiative, Epic, Story -- Atlassian

Courtesy - Atlassian

• Themes are large focus areas that span the organization.
• Initiatives are collections of epics that drive toward a common goal.
• Epics are large bodies of work that can be broken down into a number of smaller tasks (called stories).
• Stories, also called “user stories,” are short requirements or requests written from the perspective of an end user.

Note: At Telstra, work was defined at Initiative level (A Funded Block of Work).