Retain Effective and Recorded Parentage Without Future Moves

Context

Earlier reports need the arrangement effective then and, when requested, the arrangement known at an earlier moment. Current parentage alone cannot supply both dimensions.

Decision

This record describes dated parent periods and their version history, including the implemented restriction against future-effective ordinary restructuring. It does not add scheduling behavior to the planning layer.

Alternatives Considered

Keep current parentage with an unstructured audit log. That would not directly support reconstruction by both effective day and knowledge time. Accept scheduled future restructuring. The recorded phase boundary defers the scheduling and read semantics needed to make future arrangements authoritative.

Consequences

Historical descendants can be evaluated using effective and knowledge dates. Staff enter a restructuring no earlier than its effective day. A correction on the current period's first day replaces that row and retains the prior value only in versions.