SYSE.13:4.3 - What Changes in Practice

Engineers ask whether the current configuration basis distinguishes the units, variants, descriptions, and conditions needed by the decision. Product-family reuse remains available, while release and service claims become serial-unit and effectivity aware.

Tools may expose a mismatch without deciding what it means. Engineers resolve the first collision that can change the decision and leave unrelated inventory alone. A changed source reopens the smallest affected claim rather than freezing the whole product or silently rewriting the reference baseline.