Increasing the Expected Availability of Fast-Delivery Offers to Customers

A method and system for increasing the expected availability of fast-delivery offers to customers. A method may include identifying a total number of units of a plurality of items to be stored in one or more fulfillment centers. In some cases, the items may be a product or a group of products. The method may also include receiving an order forecast of expected orders for each of the plurality of items and determining, for each of the plurality of items, a portion of the expected orders that is expected to be fulfilled by the one or more fulfillment centers. The method may then include calculating based, at least in part, on the total number of units, the order forecast, and the portion of the expected orders, a target inventory of each of the plurality of items that increases an expected availability of a given delivery offer to future customers. 1. A method , comprising:storing inventory items in a plurality of fulfillment centers in different geographic regions of a fulfillment network; and identifying a maximum total number of units of a plurality of items to be stored in the plurality of fulfillment centers located within a geographic region of the regions, wherein at least one other fulfillment center is located outside of the geographic region;', 'receiving a demand forecast of expected orders for each of the plurality of items, wherein the expected orders are expected to specify delivery addresses within the geographic region, wherein the demand forecast comprises a probability density function of demand for each of the plurality of items within the geographic region, wherein the demand forecast is a portion of a demand distribution density function for the fulfillment network;', 'determining, for each of the plurality of items and based at least in part on respective order forecasts, a probability value that a unit of an item ordered for delivery within the geographic region will be fulfilled exclusively from a fulfillment center located within the ...