Evaluate accuracy (OTIF, order-pick accuracy), throughput (lines/hour), dock capacity, slotting and storage density, and SLA terms. Assess automation, WMS capabilities, reporting cadence, and contingency plans for seasonal peaks. Prioritize carriers integrated with the 3PL for predictable lead times.

Compare fixed vs variable fees, storage density impacts, inbound receiving charges, pick-and-pack rates, returns handling, and last-mile surcharges. Also factor transit time reductions, claims rates, and potential volume discounts. Request modeled scenarios for your SKU mix and seasonal demand.

Key factors: proximity to national highways and rail spurs, availability of dedicated truck yards and cross-dock capacity, frequency of carrier visits, and nearest hub locations for major parcel and LTL carriers. Also review local traffic patterns and access windows for large vehicles.

Require open APIs, EDI or modern integrations with your ecommerce platforms, real-time inventory sync, and configurable workflows for promotions and returns. Validate onboarding timelines, sandbox testing, and historical performance during peak events.