Prioritize carrier connectivity (sea and air), cold-chain and storage specs, WMS/API integration, SLA performance metrics, and capacity flexibility. Evaluate cross-dock capability, inbound consolidation options, customs handling, and documented cost-to-serve modelling to compare providers.

Seasonal weather can impact vessel schedules and road access, increasing lead times and variability. Expect higher contingency handling and fuel-related surcharges in peak conditions; mitigate with buffer inventory, multi-carrier strategies, and 3PLs that offer robust contingency planning and visibility.

Look for segmented temperature zones, flexible pick-and-pack lanes, automated sorting, returns-processing workflows, kitting and light assembly areas, and real-time inventory synchronization (WMS + API). Strong reverse logistics and SLA-backed returns windows are critical.

Negotiate transparent rates for storage, picks, packing, and accessorials; define SLAs with remedies; agree on minimums, peak season surcharges, fuel and carrier pass-throughs, billing cadence, and termination/volume-flex clauses to limit exposure and maintain margin predictability.