C.40:10 - Architectural Rationale

The common operation is changing material, examining the difference and choosing a warranted continuation. These development steps serve both a selected contribution and exploration before a destination is settled; the examination question changes with the intended use.

Coupled development adds problem construction and target-tested transfer to that common work. C.40.CD explains their dependency: a changed problem can require another operation, while a partial result or new construction can change the next useful question. Its separate entry preserves the original receiving requirement through those changes.

C.39 remains separate because an obtaining explanation can finish before any variation is feasible. An archive or a continuation policy likewise has a useful independent result, but neither supplies the changing operation.