Inventory replenishment that levels the flow of products from a collection of supplying distribution centers (DCs) to a receiving DC. Products are shipped in calculated, predetermined quantities at calculated, predetermined intervals to match the outflow rates at the receiving DC. Inventory levels at the receiving DC are monitored daily, and exceptions or adjustments to the shipment pattern (e.g., quantities and time intervals) are executed in a systematic manner when they stray outside of calculated minimum and maximum levels.