When WMS and TMS are fully integrated, businesses can reduce lead time variability across their supply chain. WMS handles internal warehouse processes—ensuring that picking and staging are fast and accurate. TMS takes over to manage dispatch timing and transit reliability. Together, they provide consistent throughput, from order to delivery. This consistency supports better planning, improves customer satisfaction, and allows companies to meet SLA expectations more predictably. For brands aiming to enhance delivery promises, full synchronization of both systems is crucial.