Description
The SvcV-4 DoDAF-described Model addresses human and service functionality.
The primary purpose of SvcV-4 is to:
- Develop a clear description of the necessary data flows that are input (consumed) by and output (produced) by each resource.
 - Ensure that the service functional connectivity is complete (i.e., that a resource’s required inputs are all satisfied).
 - Ensure that the functional decomposition reaches an appropriate level of detail.
 
The Services Functionality Description provides detailed information regarding the:
- Allocation of service functions to resources.
 - Flow of resources between service functions.
 
The SvcV-4 is the Services Viewpoint counterpart to the OV-5b Operational Activity Model of the Operational Viewpoint.
The intended usage of the SvcV-4 includes:
- Description of task workflow.
 - Identification of functional service requirements.
 - Functional decomposition of Services.
 - Relate human and service functions.
 
Implementation
SvcV-4 can be represented using:
- SvcV-4 Services Functionality Description diagram which is based on the UML Class diagram.
 - SvcV-4 Services Functionality Flow Description diagram which is based on the UML Activity diagram.
 
The SvcV-4 is the behavioral counterpart to the SvcV-1 Services Context Description (in the same way that OV-5b Operational Activity Model is the behavioral counterpart to OV-2 Operational Resource Flow Description).

