View MODAF:SV-2c System Connectivity Clusters View



The SV-2c System Connectivity Clusters View is part of the MODAF System Viewpoint and one of the 47 MODAF views*.

Version & Date

Version 1.2.004.

* =  changed at 1.2.004

+ =  new at 1.2.004

The change history is derived from the definition of each MODAF view within the The MODAF System Viewpoint viewpoint defining document from

See MODAF Release History.


From The MODAF System Viewpoint (SV) p16:

An SV-2c System Connectivity Clusters view defines how individual connections between system ports are grouped when the systems share common parent resources.

Subject to Crown Copyright


From The MODAF System Viewpoint (SV) p16:

An SV-2c product serves to define the connectivity requirements between resources which host one or more systems. Typically the hosting resource will be a physical asset, although it could also be an organisational resource.

Subject to Crown Copyright


From The MODAF System Viewpoint (SV) p17:


An SV-2c defines the connectivity requirements between resources and may be used for estimating requirements for physical routing and bandwidth, as well as defining the physical architecture within a system or system of systems. An SV-2c view is particularly useful when planning physical connections and routings between physical assets.

The SV-2c is intended to aid analysis of the connectivity between systems that are hosted separately. In particular it is a useful way of highlighting redundancy issues that is, showing when too many or too few connections are used. This could indicate opportunities for cost savings from using a common network, or that there may be a need for redundancy to increase reliability.

An SV-2c view consists of a diagram for each connection between assets and shall show:

  • The hosting resources and their systems (this should be a simple 2-level decomposition).
  • The system-to-system connections that run between.
  • Which ports are used in which system-to-system connections.

Subject to Crown Copyright


Data Objects

From The MODAF System Viewpoint (SV) p16:

The data in an SV-2c can include:


Subject to Crown Copyright

Note that the diagram shows that the following can also be shown in the SV-2c:

Note: Port Connection is incorrect as this was renamed at 1.2.004 to Resource Port Connector.


From The MODAF System Viewpoint (SV) p16:

  • Topological (connected shapes)
  • UML composite structure diagram

Configuration History


Care is needed - the other forms of SV-2 only allow resource interactions between systems to be described and characterised. At MODAF 1.2.004 any Resource can have a Resource Port. The SV-2c seems to allow Organisational Resource even though it only specifies System as a Resource in the Data Objects. Clearer / more explicit definition is needed with respect to how this aligns with the SV-2a and SV-2b which don’t include Organisational Resource.

Description isn’t consistent with simplified metamodel - Software and Software Port missing from data objects



Other Frameworks

See also:

Category:Framework -> View
Category:MODAF -> View



© 2010 Eclectica Systems Ltd.