To turn the organization hierarchy on or off, click Hierarchy Off or Hierarchy On.
By default, the organization hierarchy is switched off. If you switch the
organization hierarchy on, the tasks are grouped according to the
hierarchy.
Hierarchical tasks have a parent organization. If all tasks under the parent organization
have a status of Open, then the parent organization has a status of Pending. The
status of the parent changes to Open when one or more of the tasks under it are
submitted. Tasks with a status of Pending are not active.