Focus on order accuracy, on-time dispatch rate, average pick-and-pack time, inventory accuracy, dock-to-delivery lead times, and cost per order. Also evaluate system integration (WMS/API), SLA penalties, capacity flexibility, and carrier performance for last-mile reliability.

Proximity to arterial roads reduces trucking hours and fuel spend for domestic lanes; regional carrier density influences pricing and frequency. Shorter inbound routes lower safety stock needs and improve replenishment cadence, reducing holding costs and improving fill rates.

Require clear zone definitions (receiving, storage, picking, packing), scalable labor models, WMS with multichannel routing logic, bonded or customs-capable areas if needed, cross-dock capability, and documented surge staffing plans tied to SLAs.

Confirm local customs procedures, bonded warehouse licensing, VAT handling, and documentation workflows. Ensure the 3PL has experience with customs clearance, export declarations, and can provide compliant record-keeping for audits to avoid delays at borders.

Assess total landed cost including warehousing per-pallet/month, pick-and-pack fees, cross-dock and inbound handling, outbound freight, and expected shrink. Balance these against service metrics—lead time, fill rate, and returns handling—to model customer experience and margin impact.