A method, system and program product for optimally managing fulfillment of orders that are channeled through a diversified manufacturing environment that utilizes different process models, product nomenclatures and communication methods. The method includes sending by a contemporary fulfillment application to a legacy application a scheduling request for an order that includes a code recommending that the order is deemed eligible for fulfillment by a specific manufacturing site. The method further includes returning by the legacy application a scheduling response providing scheduling information for the order and confirming that the order is to be fulfilled by the specific manufacturing site. The method further includes transmitting a shipment request by the contemporary fulfillment application to a contemporary production application for routing delivery of the order to the specific manufacturing site and receiving a shipment response from the contemporary production application providing a delivery status of the order.