Prioritize order cycle time, pick/pack accuracy, dock throughput, inventory accuracy, and on‑time delivery. Ensure the 3PL offers a modern WMS with API/EDI, scalable racked capacity, returns processing, temperature‑controlled storage if needed, and documented SLA penalties for service failures.

Close access to Arlanda shortens air transit and expands express carrier options; the E4 corridor provides fast road links to Stockholm, the south coast, and northern markets. Together they lower transit times, enable competitive LTL and express rates, and improve pickup frequency for tight SLAs.

Look for a mix of high‑bay racking, dedicated pick faces, conveyor/sortation or goods‑to‑person systems for high SKU velocity, climate zones for regulated goods, cross‑dock capacity, and adequate dock doors. These elements drive throughput and predictability as volume scales.

Evaluate the 3PL’s VAS capabilities, lead times for kitting, labor rates, quality control procedures, inventory visibility, and billing transparency. Model total landed cost including handling, storage tiers, and returns to determine whether outsourcing reduces per‑unit cost at target volumes.

Key cost drivers include pallet positions or cubic usage, labor and throughput requirements, inbound/outbound handling fees, slotting and pick charges, peak season surcharges, and minimums. Negotiate tiered pricing, volume discounts, shared risk clauses, and defined SLAs to align incentives.