You can only create a hierarchy in hierarchy maintenance. You can assign work centers to hierarchies in both work center maintenance and hierarchy maintenance
In the work center area menu choose
The Hierarchy screen appears.
Enter the plant and the name of the hierarchy.
Choose
.The Create Hierarchy: Header screen appears.
Enter a short description of the hierarchy.
Assign work centers to the hierarchy.
Note
For how you assign work centers to a hierarchy, see
Assigning Work Centers in Hierarchy Maintenance