Breakdown View
Click
PLANNING > 
Breakdown.
The Breakdown view enables you to define and group Stories into a meaningful tree organization. The organization structure is user-defined, allowing the creation of a tree structure that matches each individual project's needs. You can create new items inline, and use drag-drop to move items within the hierarchy.
Work items are broken down into Stories (using parent-child relationships) that make up the actionable Backlog. This is often done when an individual Story is too large and cannot be completed within the boundaries of your preferred delivery window: Sprint, Release, or Kanban Board. These individual Stories provide incremental progress toward the larger defined need. That means:
- Stories in the Breakdown view that do not have children and are not already scheduled in a Sprint are fed to the Backlog for ranking and then delivery assignment.
- These Stories (Stories that are parents) will never exist in the Backlog and cannot be assigned to a Sprint. They are in the Breakdown view allowing you to organize the smaller, actionable Stories. However, these Stories are available for use in a Kanban Board.
See the following diagram:
