Signal boards that survive Korean holiday surges

Retailers along the Seoul–Daegu corridor often discover too late that their signal boards still assume a normal two-week receiving cadence. We start by anchoring on dock appointment variance instead of sales alone, because holiday surges show up in trucks before they show up on shelves.

The second paragraph documents the uncomfortable bit: finance still wants a single GMROI lens while operations needs lane-level cover. We do not resolve that tension magically—we build a decision log that forces explicit trade-offs whenever thresholds move.

Finally, we publish a rehearsal calendar. Planners run dry exercises with anonymised volumes so the board survives shift changes. The limitation is clear: if upstream suppliers falsify ASN times, the board will flash false positives until procurement intervenes.