A work center that does not have any physical resources and
cannot be modeled in a routing. It is used for capacity planning and displays
the total capacity requirements of the shared work centers. The work is
actually carried out in shared secondary work centers, which can be in the same
or a different logistical company than the primary work center. This enables
you to plan and carry out work in several different logistical companies (if
you define several secondary work centers) without having to use sales orders
and purchase order.