CAD.Reference:4.7 - Recognition, assurance and the cost of the arrangement

A layered diagram recognizes a candidate organization. A plausible trace recognizes a candidate behavior. Mathematical invariance establishes a conditional property; a real model, disturbance envelope and execution arrangement must support its premises before physical reliance. These are different results, and the full use needs whichever the intended claim actually consumes.

The primary trade-off is between cheaper or more specialized local decisions and the burden of maintaining their coupling. More patterns or more formal interface declarations do not settle that trade-off. The arrangement earns its cost when separate decisions remain useful and their conditions can be made compatible. A direct controller or direct existing Method remains preferable when it already serves the task.

A whole-use inspection therefore asks whether the selected split has a useful reason, whether the derived exchange is the one realized, whether its command/error dependence closes, whether continuation and performance are distinguished, and whether implementation conditions fit. These questions use the full constructions of CAD.1–CAD.4; they are not an alternative checklist proof.