SYSE.2:9 - Consequences

The project can ask architecture questions from a concrete outside-use basis without waiting for a complete requirements package. It can compare changes across the assumed boundary, preserve non-nested environment structures, and return evidence to the claim it can actually change.

The cost is ongoing concept maintenance. A use claim, System concept, and representation can diverge as new evidence arrives. Keeping their relations explicit requires more care than freezing one document, but it avoids the larger cost of treating an obsolete description as the use or architecture itself.