Assigning Resources in Resource Maintenance 
Prerequisites
You have created several resources and a resource hierarchy.
You can assign resources to hierarchies both in resource maintenance and in hierarchy maintenance.
For this reason, see also
Assigning Resources in Hierarchy Maintenance.Procedure
Hierarchy in resource maintenance. This calls up the Hierarchy Relationships screen where the existing resource assignments to a hierarchy are displayed.
The Hierarchy Detail screen appears.

A resource can only be defined as a hierarchy root if the hierarchy does not already have a root.

If you do not define the resource as the hierarchy root and you do not enter a superior resource, the resource will not be assigned to the hierarchy.
You can use this indicator to specify that when cumulating available capacity starting with the resource for which the indicator is set, the hierarchy may not be exploded further downward. You may want to do this if, for example, the available capacity of this resource is to be larger than the cumulated available capacity of the subordinate resources.
If you have specified the hierarchy level up to which capacity cumulation is to take place and set the Stop explosion indicator in the resource, available capacities of this hierarchy branch will only be cumulated up to this resource.
Result
The resources are assigned to the hierarchy.
In the next step, you specify the hierarchy levels of the resources. For more information, see
Assigning Resources to Hierarchy Levels.