An Integrated Production, Distribution, and Inventory Planning System

The critical importance of integrating production, distribution, and inventory (PDI) operations has long been recognized by top management of many companies. Now. using (he laiest advances in Managemenl Science modeling and solution technology, an integruied computer-based PDI system has saved approximately $18 million dollars during its first three years of implemenlalion for a major national firm. Agrico Chemical Company. According to ihe Vice-Presideni of Agrico Supply and Dislribulion. an addilional $25 million savings is anticipated over the next two years. Broughi about by close cooperation between company officiais and an outside staff of Management Science consultants, the PDI system has been used extensively to evaluate the benefit/cost impact of alternative capital investments in both shon-term and long-term planning decisions. The development of the system underscores the value of recent Management Science innovations that have made it possible to analyze interacting influences too numerous and complex to be analyzed adequately only a few years ago. Advanced network methodology incorporated inio Ihe PDI system required onl> one one-hundredth of the computer lime and cost of meihodologies previously used. The power and flexibility of the new Management Science tools have also brought about increased communication and understanding of key company operations. This increased communication and understanding stems from ihe inherent '"pictorial" nature of network-based models, which facilitates interpretation of these models and policy recommendations based upon their solution. IN VENTORY/PRODUCTION; NETWORKS/GRAPHS INTERFACES November 1979 21