Prioritize SLA reliability, transit-time maps to your customer base, pick-and-pack throughput, inventory accuracy rates, and technology compatibility (WMS/TMS/API). Also evaluate carrier density for your lanes, seasonal labor availability, cost-per-pick modeling, and contract flexibility for volume swings.

Main cost drivers are rent and space utilization, labor rates and productivity, inbound/outbound handling fees, inventory holding charges, and transportation line‑haul. To control costs consider slot optimization, cycle-counting to reduce safety stock, consolidated inbound windows, and negotiating blended rates with carriers.

Wenshan City's proximity to provincial highways and regional feeder routes reduces line‑haul variability and enables same- or next-day delivery windows to key population centers. Evaluate 3PLs with strong carrier contracts and frequent dispatch schedules to maximize routing flexibility and reduce transit exceptions.

Confirm real-time WMS visibility, API integrations for order flow and inventory sync, barcode/scan accuracy, SLA reporting, and ability to scale labor and footprint during peaks. Also ask for disaster-recovery plans, onboarding timelines, and performance KPIs tied to penalties or service credits.