C.30.LCA:3 - Forces

• Control talk is useful and current engineering practice uses it, so deleting it would make architecture prose less usable.
• The same source labels can name different things. C.30.LCA applies after an exact direct control relation, rate-band relation, control-layer relation, or B.2.5 supervisor-subholon relation is recovered. An assignment is neither required nor sufficient for control; include it only when it independently obtains. A model-use structure is cited only when that independently selected structure changes interpretation.
• Layered and multi-rate control descriptions often need timing and dynamics claims before they can carry stability or safety claims.
• B.2.5 supplies a compound supervisor-subholon feedback claim grounded in observation, return and coupling facts. A feedback diagram alone establishes none of those facts.
• Mathematical graph descriptions of E.18 TransformationFlowStructure values can describe flow, path, crossing, or transformation-flow relations relevant to control, but the selected flow structure, graph expression, and control structure remain distinct.
• Practitioners need one small first output; exact viewpoint conformance, dynamics, C.29, evidence, assurance, and gate records are used only when the question calls for them.