The simplest way to manage sets of resources is to associate resource groups directly with a resource description. To do this you would:
Use the Resource group scope name (WUI) or ResGroup Scope (EUI) field on the resource description to identify a CICS® system or CICS system group where all the resources in the groups should be assigned.
The result is that all of the resources in the resource groups are assigned to the specified CICS systems exactly as they were defined to CICSPlex® SM. This is similar to the way in which RDO processes the definitions in a CSD group list.
As with RDO, this simple approach to managing your resources requires separate resource definitions for each element of a resource. So assigning a resource that is local to one CICS system and remote to another would require two resource definitions. And the resources represented by a resource description are more likely to be physically related by the CICS systems where they reside than by any logical function such as an application.
Directly associating entire resource groups with a resource description is in keeping with the basic object model used by other CICSPlex SM components (such as Workload Manager). And this approach is sufficient for using Business Application Services in a manner similar to RDO. However, this can also be viewed as an interim step on the way to complete management of your CICS resources with the use of resource assignments.