Simulation of an inland waterway barge fleet distribution network

The paper discusses how a discrete event simulation model was developed using ProModel Software for application as a PC based decision support tool in the logistical management of a marine based distribution system. The system is operated on an inland waterway network with a dedicated fleet of barges and tugboats to transport products from several source plant loading points to multiple distribution sites at other locations along the waterway network. The general problem addressed here is the determination of proper fleet sizing, and appropriate resource allocation to meet potential delivery requirements in a timely manner. A familiar argument was found to exist here: operations personnel in the field claimed that a shortage of resources (barges) preclude them from achieving required system performance, while management claimed that available resources are sufficient but are not being applied in the most effective manner. With cost estimates for new barge investments being in the neighborhood of $250000 each, an appreciation and understanding of the true resource requirements presents a worthwhile undertaking. Proper development and analysis of an appropriately thorough, and visually enhanced, simulation model of the system is well suited as a potential solution in settling the argument.