Figure D.7 - Elaborating Black Box Behavior for the “Drive the Vehicle” Use Case

So it seems one should be able to just reference the States (but using correct Capital first letters) from the StateMachine HSUVOperationalStates as long as the context of the Interaction is consistent with that of the StateMachine.

But SysML-1.6 makes explicit that the Interaction DriveBlackBox is owned by the AutomotiveDomain block, so the self won’t be the same context as for the StateMachine.

The name of the alt fragment 'controlSpeed' does not appear in the SysML-1.6 figure (it did in the SysML-1.5 version). It can't be shown in MagicDraw/Cameo anyway.

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Figure D.8 - Finite State Machine Associated with “Drive the Vehicle”

Notes

[CONVENTION, MODELLING, TIP]{RECOMMENDED} Webel: MBSE: SysMLv1: Prefer a custom «actor» extension of a Block (such as the non-normative External) over UML-style Actor for use as parts in IBDs and on allocation swimlanes. You can also have a Trace from a block-based «actor» to a UML-style Actor.

Snippets (quotes/extracts)

[SysML-1.6] Figure D.7 shows the interactions between driver and vehicle that are necessary for the “Drive the Vehicle” Use Case. This diagram represents the “DriveBlackBox” interaction, with [which] is owned by the AutomotiveDomain block.

[SysML-1.6] The conditions for each alternative in the alt controlSpeed sub clause are expressed in OCL, and relate to the states of the HybridSUV block, as shown in Figure D.8.

[OCL-2.4] The operation oclIsInState(s) results in true if the object is in the state s. Possible states for the operation oclIsInState(s) are all states of the statemachine that defines the classifier's behavior. For nested states the statenames can be combined...

[SysML-1.6] Figure D.7 illustrates the overall system behavior for operating the vehicle in Sequence diagram format.

[SysML-1.6] To manage the complexity, a hierarchical sequence diagram is used which refers to other interactions that further elaborate the system behavior (“ref StartVehicleBlackBox”).

[SysML-1.6] CombinedFragments are used to illustrate that steering can take place at the same time as controlling the speed and that controlling speed can be either idling, accelerating/cruising, or braking.

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