Various embodiments of a system and method for managing shipment release from a storage area in a materials handling facility are described. Embodiments may include a system configured to identify multiple shipments that each includes one or more units that are eligible to be conveyed from a storage area to a respective packing station in a materials handling facility. The identification of a given shipment may include determining that shipment is compatible with a packing capability of the packing station. The system may be configured to evaluate each respective shipment according to one or more shipment-related criteria to generate a ranking of at least some of the multiple shipments. The system may, in response to determining that a particular shipment is ranked highest relative to other shipments of the ranking, generate an instruction to convey the units of that particular shipment from the storage area to the respective packing station.