Prioritize WMS/API integration, inventory accuracy, SLA-backed pick-pack cycle times, returns and reverse-logistics capability, temperature-controlled options if required, and the provider’s ability to scale labor and space during peaks while maintaining clear performance reporting.

Carrier access and consistent transit times directly affect shipping rates, delivery predictability and the need for buffer stock. Evaluate road connectivity, frequency of regional freight services, consolidation options, and typical transit variances to understand landed costs and serviceability.

Negotiate transparent storage and handling rate schedules, volume tiers, minimums, chargeback terms, SLAs for order accuracy and on-time fulfillment, invoicing cadence, reporting cadence, and audit rights. Include capacity-flex clauses for seasonality and defined penalties for repeat SLA failures.

Assess racked versus bulk capacity, staging areas, dock availability, staging and sortation systems, temporary labor access, packaging and kitting services, and returns-processing workflows. Confirm contingency plans, throughput metrics, and the provider’s track record handling seasonal volume spikes.