Prioritize order accuracy, on-time shipping rate, average pick-and-pack time, inventory accuracy, and cost-per-order. Also evaluate WMS integration latency, return processing time, and seasonal labor scalability. These KPIs align carrier performance with customer SLA expectations while highlighting true landed-cost impacts.

Review the 3PL's carrier contracts, transit time matrices to major Nordic hubs, consolidation frequency, and access to short-sea services. Check published LTL/FCL routes and fuel/peak surcharges. Consider run-rate scenarios for volume tiers to compare effective cost-per-shipment.

Verify WMS compatibility and API support, cold-chain temperature zones, racked storage density, cross-dock capacity, and slotting optimization. Also confirm staffing models for peak seasons, security protocols, and physical access for carrier loading to ensure consistent SLA delivery.

Seek clear SLAs for order accuracy, on-time shipments, inventory reconciliation cadence, and chargeback terms. Negotiate minimum performance thresholds, audit rights, dispute resolution, and transparent pricing for value-added services. Consider trial periods and volume-based rebates to validate operational fit.