Allocating Components to Standard Networks 
You can also allocate material to a standard network when you create the standard network.
If no material components have been allocated to the standard network yet, the Bill of Material dialog box appears.
If material components have already been allocated to activities of the standard network, a dialog box appears in which the corresponding BOMs are displayed.
The further procedure is the same as if no components had been allocated.
If several BOM alternatives exist for the material, a dialog box with the alternatives appears. Select an alternative. A list of the material allocations appears.
The system allocates the BOM items to the activity.
The activity overview appears again.