Assigning Standard Networks to Standard Work Breakdown Structures 
When you create assignments between a standard network and a standard work breakdown structure, you can create an operative WBS at the same time that you create an operative network.
The system only creates the WBS elements to which activities from the standard network are assigned, along with the WBS elements superior to them in the hierarchy.

You cannot assign a standard network directly to a standard project definition; you must do this indirectly, using a standard WBS.
Assigning a Standard Network to a Standard WBS Element
You can link both the header and the activities of a standard network to a standard WBS element. When you enter the standard WBS element in the header, this WBS element will be proposed for the activities as well. You can overwrite it.
The standard network header is displayed. If you did not specify an alternative, the system first displays the overview of alternatives.
Assigning Activities in Standard Networks to Standard WBS Elements
You can link the activities in a standard network with one or more standard WBS elements from one or more projects. Proceed as follows:
The standard network header is displayed.
When you create an operative network by referencing a standard network, the system also creates work breakdown structures with the WBS elements to which network activities have been assigned (along with the part of the structure superior to these elements).
See also:
For detailed information on the various ways that linked standard networks and standard WBS can be copied into operative structures, refer to
Creating Networks by Copying Standard Networks