Prioritize SLA metrics such as order cycle time and on‑time ship rate, pick/pack accuracy, average throughput (orders/day), storage density, capacity flexibility, WMS/API connectivity, returns processing, value‑added services (kitting, labeling), and security/certifications. Verify escalation paths and reporting cadence to monitor KPIs against contractual targets.

Closer proximity to highways, rail corridors, and airports reduces drayage and linehaul costs and shortens lead times, improving delivery windows for same‑day or next‑day services. It also lowers cross‑dock time and enables cheaper multimodal routing; weigh these transit savings against facility rental differentials when modeling landed cost.

Expect line items for storage (€/m2 or pallet), throughput fees (per pick/pack), inbound/outbound handling, inventory management, special handling, and returns. Negotiate volume tiers, minimums, billing cadence, performance SLAs with credits/penalties, liability limits, and exit terms to align cost exposure with forecast variability.

Yes—most reputable 3PLs provide WMS, API/EDI integrations, and portal access. Require a documented integration plan: data mapping, test transactions, cutover window, pilot order volume, and defined SLAs. Confirm support for inventory visibility, shipping label standards, and rollback procedures to minimize disruption during scale‑up.