Prioritize SLA performance (OTIF, order accuracy), WMS/API integration and real‑time inventory visibility, dock and yard capacity for peaks, scalable labor plans, and proven returns and reverse logistics processes. Evaluate value‑added services like kitting, custom packing, and light assembly when total cost‑to‑serve is modeled.

Compare fixed versus variable fees, detailed pick/pack rates, storage billing (by pallet, bin, or cubic), inbound receiving and putaway charges, dimensional weight and parcel pass‑throughs, minimums, and fees for value‑added services. Run sample order profiles to model true per‑order cost across channels.

Proximity to major highways, intermodal terminals, and carrier hubs reduces transit miles and zone crossing; dock density and trailer parking affect throughput; regional labor availability impacts labor rates and service flexibility; and nearby parcel sort centers determine parcel zones and shipping cost tiers.

Require clear SLAs for order accuracy, pick‑to‑ship time, inventory accuracy, and OTIF; real‑time WMS connectivity (API/EDI), automated ASN and barcode workflows, reporting cadence, and penalties for missed SLAs. Confirm capacity commitments for peak seasons and procedures for exception handling and RMA processing.