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22 Maritime Reporter & Engineering News ? AUGUST 2014 EYE ON DESIGNThe uptime, or operability, of a speciÞ c operation can be cal- culated with existing methods and tools in different ways. However, each speci Þ c operation is of- ten just a small stage in a long chain. When planning an operation a key parameter is to know the efÞ ciency and duration of the operation. When the op- eration is a continuous process, such as the iterative transport of cargo between locations, or when the operation con-sists of a successive series of operations, such as installing an offshore wind park, variations in weather and the availability of cargo can impact the operation. The varying nature of these ?disturbances? and the effect they have on the complete logistical chain make it difÞ cult to de- termine the efÞ ciency or duration of the whole operation. To support developers, planners and engineers to determine the efÞ ciency of a logistical chain from a hydrodynamic point of view, MARIN developed ScenSim.The program simulates the logistics of shipping and offshore operations by combining MARIN?s existing hydrody- namic programs into a logistic scenario. A scenario can consist of multiple ves- sels, locations and iterations interacting with each other. ScenSim is based on a time step ap-proach. Initially the operability of each vessel is calculated at every time step, then the interactions between vessels, cargo and locations are determined and Þ nally the status of each object is up- dated. At the end time of the simulation the program shows how much cargo was handled and transported during the whole simulation and the total time re-quired to perform the whole scenario.The scenario analysis program fa-cilitates the simulation of the complete logistical chain from a hydrodynamic point of view. ScenSim can be used to indicate bottlenecks in the logistical chain so these can be eliminated, thereby increasing uptime and improving the overall efÞ ciency. Hydrodynamic Applica ? onsLogistical Scenario Analysis forBY JORRIT-JAN SERRARIS The AuthorJorrit-Jan Serraris is senior project man- ager at the Offshore Department of MARIN, the Maritime Research Institute Netherlands.e: j.w.serraris@marin.nl To calculate the operability of the whole logistics chain, rather than only individual opera- tions, MARIN has developed the hydrodynamic scenario analysis program ScenSim.MR #8 (18-25).indd 22MR #8 (18-25).indd 228/11/2014 12:30:38 PM8/11/2014 12:30:38 PM
