Description The SV-5a addresses the linkage between system functions described in SV-4 Systems Functionality Description and Operational Activities specified in OV-5a Operational Activity Decomposition Tree or OV-5b Operational Activity Model. The SV-5a depicts the mapping of system functions and, optionally, the capabilities and performers that provide them to operational activities. The SV-5a identifies the transformation of an operational need into a purposeful action performed by a system or solution. During requirements definition, the SV-5a plays a particularly important role in tracing the architectural elements associated with system function requirements to those associated with user requirements. The intended usage of the SV-5a includes: - Tracing functional system requirements to user requirements.
- Tracing solution options to requirements.
- Identification of overlaps or gaps.
Implementation SV-5a can be represented using a SV-5a diagram which is an editable Dependency Matrix. System functions are used as row elements and Operational Activities are used as column elements. ![UAF Plugin 2021x Refresh1 > SV-5a Operational Activity to Systems Function Traceability Matrix > SV-5a.png (SV-5a Operational Activity to Systems Function Traceability Matrix) SV-5a Operational Activity to Systems Function Traceability Matrix](/download/attachments/70415328/SV-5a.png?version=1&modificationDate=1433999172139&api=v2)
DoDAF uses the term Operational Activity in the OVs and the term system function in the SVs to refer to essentially the same kind of thing; both activities and functions are tasks that are performed, accept inputs, and develop outputs. The distinction between an Operational Activity and a Function is a question of what and how. The Operational Activity is a specification of what is to be done, regardless of the mechanism used. A system function is specifies how a resource carries it out. For this reason, SV-5a is a significant model, as it ties together the logical specification in the OV-5a with the physical specification of the SV-4 Systems Functionality Description. System functions can be carried out by Functional Resources (systems, performers executing activities, and performers). |