UPDM — OV-2 & StV-2 Capabilities & Nodes.

OV-2 & StV-2 Capabilities & Nodes: MODAF was designed with capabilities to have metrics. This forces a number of capabilities to be added at leaf level in StV-2. It has become apparent that this is somewhat unwieldy in real architectures. Strongly recommend that you re-model capabilities to have Measure of Effectiveness attributes (property types - e.g. "max speed", "range", etc.") but no property values in the capability itself. Then, when a node traces to a capability, the tracing relationship can specify the required or actual level of capability for the node. Similarly a CapabilityConfiguration would also specify the level it achieves on it's tracing to the capability. This makes StV-2s much more practical to use and also better reflects a Systems Engineering MoE approach. Although this is not in MODAF, it should be - the current approach in MODAF is quite impractical on larger architectures. If you go this route, it also provides you with a much better way to express environmental conditions that capabilities are expected to deliver under - you can show the environmental conditions against the node, not the capability - i.e. "this node is in the desert and we need it to have these levels of capability in its environment".
Diagram OV-2 / StV-2
Document Issue UPDM (OMG Beta) Jan 2009

Source Ian BaileyModel Futuresian@modelfutures.com

Resolution POTENTIAL SOLUTION:All UPDM Elements support measurements being attached to them - so what's requested in this issue is already supported. This can therefore be rejected.

duplicate of issue13739, voted on in ballot 9