Focus on measurable KPIs: order accuracy, on-time pick/pack, and return processing. Ensure the 3PL offers WMS integrations (API/EDI), scalable staffing during peaks, cross-dock and consolidation services, and transparent reporting to monitor carrier performance and cost per order.

Proximity to major highways and rail links shortens driving distance to Bangkok and regional hubs, lowering fuel and line-haul costs. Local carrier networks in the province improve last-mile reliability; choosing a site near industrial clusters reduces inbound supplier lead times and handling charges.

Look for robust WMS with real-time inventory, barcode/RFID support, batch/lot tracking, and integrations for marketplaces and carriers. Automation options (conveyors, pick-to-light), adequate dock capacity, and dedicated returns processing help maintain throughput and SLA compliance.

Negotiate clear per-activity rates, volume tiers, and minimums; define SLAs for accuracy, lead time, and claims; include seasonal capacity guarantees and exit/transition terms. Require regular performance reviews and data access for continuous cost-to-serve analysis.