Evaluate transit time matrices to your customer zones, carrier integrations (courier and LTL), SLA guarantees for pick/pack/ship, warehouse management system compatibility, inventory visibility tools, and the 3PL’s capacity to scale for peak seasonality and returns.

Location drives first‑mile and last‑mile mileage, which affects fuel and carrier charges; proximity to border crossings and ports reduces drayage and inland transit; lower local rents and labor reduce storage and handling costs—combine these in a cost‑to‑serve model to quantify impact.

Confirm pick/pack accuracy rates, returns processing flows, kitting and light assembly, custom packaging options, inventory reconciliation frequency, and service level reporting. Also validate insurance, security protocols and customs brokerage support if cross‑border movement is required.

Ask which regional couriers and LTL carriers are integrated, average transit times to your top customer ZIPs, frequency of carrier pickups, available expedited lanes, and the 3PL’s ability to support multimodal routing to optimize cost and delivery windows.