Require measurable KPIs: on‑time order fill rate, inventory accuracy, order cycle time, dock‑to‑stock lead, cost per order, and return processing SLA. Include penalties/incentives tied to those metrics and request regular scorecard reporting and access to WMS dashboards for verification.

Request sample transit time matrices, carrier lane maps, and proof of established contracts with regional haulers. Validate road connectivity to trunk routes, frequency of carrier runs, and historical on‑time delivery data to the primary delivery zones your business serves.

Prioritize WMS with API/EDI connectivity, multi‑channel pick/pack workflows, scalable racking, secure receiving/cross‑dock bays, returns processing, and selective climate control if needed. Confirm cycle count procedures and integration with order management systems.

Model fixed vs variable fees, per‑order and per‑unit pick/pack charges, storage calculations, minimums, fuel surcharges, inbound handling, and value‑add fees. Negotiate clear SLAs, volume tiers, audit rights, termination terms, and defined invoice dispute processes to limit hidden charges.