Prioritize clear SLAs, proven throughput metrics, WMS/API connectivity, receiving and cut‑off windows, capacity for value‑add services (kitting, returns), labor scalability, and demonstrated experience with your product profile. Ensure contract terms include performance KPIs and transparent accessorial fees.

Proximity to ports and intermodal terminals reduces inbound lead times and ocean-to-warehouse handling. Dense parcel and LTL networks increase pickup frequency and lower per‑shipment costs, improving last‑mile reliability. Confirm daily carrier windows and regional hub connectivity for accurate transit estimates.

Require an integrated WMS with real-time inventory, API order flows, support for batch and single‑unit picking, zone and wave optimization, temperature control if needed, and space for value‑added operations. Ask for documented uptime, onboarding timelines, and sample integration workflows.

Compare proposals with a consistent activity matrix (receipts, storage days, picks, pack types, returns). Include accessorials, minimums, and labor surcharges. Model scenarios for peak and off‑peak demand to see true per‑order costs and service impacts before signing long‑term agreements.