Prioritize measurable SLAs, carrier density, IT/ERP integrations (API, EDI), order cycle times, and flexibility for peak surges. Verify warehouse capabilities such as bonded storage, temperature control, kitting, returns processing, and on‑site value‑added services to match your SKU profile.

Proximity to major road and rail arteries reduces domestic transit windows and enables multi‑modal routing. Select 3PLs with established carrier contracts and cross‑dock capacity to optimize LTL consolidation, route density, and last‑mile partners for regional lanes.

Seek warehouse management systems with real‑time inventory, order tracking, and analytics; multi‑carrier shipping integrations; and customizable dashboards for KPIs like order cycle time, pick accuracy, and landed cost. Ask for audit access and data export capabilities for your TMS and ERP.

Optimize SKU velocity segmentation, slotting, and packaging to reduce pick time and dimensional weight charges. Negotiate volume‑based rates, review storage tiers (bulk vs. racked), and implement returns triage to limit reverse logistics costs.

Assess labor scalability plans, seasonal workforce agreements, surge SLA commitments, and contingency routing. Confirm customs brokerage experience, bonded storage options, and reverse logistics workflows. Consider providers offering rapid onboarding, clear performance penalties, and scalable IT integrations.