Prioritize SLA performance (OTD, accuracy), WMS/API integration, returns and reverse logistics handling, peak-season throughput, and value-added services (kitting, labeling). Validate physical capacity, labor model, and contingency plans for surges to ensure the 3PL matches SKU velocity and channel mix.

Proximity to the regional airport, expressways, and rail corridors enables modal optimization: use rail for bulk inbound, road for local distribution, and air for urgent outbound. This reduces transit variability and unit transport cost, improving predictability for B2B replenishment across central and western provinces.

Look for validated temperature-controlled zones, calibrated monitoring, flexible racking and slotting, a robust WMS with wave/zone picking, scalable labor pools, and cross-dock/flow-through areas. Confirm contracted surge capacity and KPIs for pick speed and accuracy during peaks.

Negotiate clear SLAs (accuracy, lead time), transparent charge structures (storage, handling, surcharges), volume-based tiers, liability limits, audit rights, and IT integration timelines. Include forecast/booking commitments and performance-based incentives or penalties to align cost and service reliability.