From Post-Apocalyptic RPG wiki
This article will be used as impediment backlog during sprints.
What is an impediment backlog?
The impediment backlog is a prioritized list of impediments the sprint coordinator resolves to support the work of the sprint team.
What kind of items reside here?
Impediments that can be solved right away don't have to be added to the impediment backlog. More complex impediments that take some time to resolve are added to it so they're not forgotten. Furthermore the impediment backlog can be used to update the sprint team about the status of impediments.
Actual impediment backlog for a specific sprint.