Prioritize order cycle SLA, on-time delivery rates, inventory accuracy and WMS integration (APIs). Evaluate dock and cross-dock capacity, temperature-controlled space if required, storage density, pick-and-pack costs and carrier diversity. Compare transit-time maps to Swiss hubs and typical surge handling to model true cost-per-order.

Cross-border operations introduce customs clearance, VAT accounting and potential transit procedures. 3PLs offering bonded or customs-broker services reduce delays and paperwork but may add handling fees. Select providers experienced in EU–Swiss flows to minimize clearance time and avoid unexpected landed-cost increases.

Prioritize scalable storage and flexible labor models, automation for peak throughput, cross-dock and staging areas, and temperature control if needed. Ensure broad carrier integrations (national carriers, regional road and rail intermodal) and transparent surge pricing and SLA guarantees to support omnichannel timelines and seasonal volume swings.