SYSE.28:2 - Problem

Controls placed too early can report a property that is later lost. Controls placed too late can discover a prohibited effect only after it occurs. Repeating the same check at every step can add delay without covering the actual point of loss.

A second failure is to merge different results: advice, an observed property, a technical block and an authorized decision. A successful mechanism does not create authority, while an authorized exception does not turn a failed observation into a pass.