For escalation when the Team feels this issue can hardly be completed in time due to unforeseen impediment.

Used to document external contributions expected from stakeholders (ex. delivery or support from another PC). Convention : use the name of the external team as a prefix for the name of the issue. E.g. «PC2: provide support on Eztrace»

Identify topics that are especially awaited for the next PI. Teams should focus first on planning these issues.

Used to track "big" work items, e.g. the total effort is a matter of months, not weeks or days. Such items should be further split in smaller issues. Use «linked Items» to connect all the small issues to the big one.