An order fulfillment tool may indicate fulfillability information for a plurality of open orders and receive user input specifying one or more orders for potential fulfillment. In response, the order fulfillment tool may indicate revised fulfillability information for orders not specified for potential fulfillment according to the effects on a current inventory if the specified orders were fulfilled. The order fulfillment tool may also recommend orders for potential fulfillment according to user-specified order fulfillment criteria and indicate revised fulfillability information for orders not recommended for potential fulfillment. Such an order fulfillment tool may also receive user input specifying fulfillment levels for individual items of orders and update fulfillability information for other orders according to the effect of the individual fulfillment levels.