Prioritize WMS/API integration, zone-to-zone lead times, volumetric and unit pick capacity, returns and reverse-logistics handling, and cold-chain or bonded services where required. Also verify carrier partner coverage for same-day and next-day last-mile deliveries.

Closer facilities reduce drayage and in-transit time, lowering variability and demurrage risk. Evaluate dray distances to Incheon port and Gimpo/Incheon airports, customs clearance lanes, and bonded options to quantify reductions in lead time and total landed cost.

Request order cycle time, on-time ship rate, inventory accuracy, dock-to-stock time, pick/pack cost per order, shrinkage rates, and carrier tender acceptance. Consider service-level simulations for peak season and SKU velocity segmentation to validate capacity and scalability.