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Cost Engineering Optimum Seaport Capacity, Douglas D. Gransberg, John P. Basilotto
Cost Engineering Optimum Seaport Capacity, Douglas D. Gransberg, John P. Basilotto
Douglas D. Gransberg
Using queuing theory to solve port optimization problems can result in large potential savings by both ports and shippers. This methodology generally makes the assumption that minimizing ship waiting time optimizes the entire port system. However, this overlooks the contribution to the system given by the port itself. There is a fixed cost of facilities that must be incurred to open a berth at a port. By minimizing ship waiting time alone, the current algorithm tends to encourage ports to build excess capacity. When a port's cargo transfer capacity is idle, the port authority suffers a capital cost of lost …
A Review Of Methods To Estimate Haul Fleet Production, Douglas D. Gransberg
A Review Of Methods To Estimate Haul Fleet Production, Douglas D. Gransberg
Douglas D. Gransberg
Five methods that are used to estimate haul fleet production based on optimal analysis are reviewed. The results predicted by those methods are compared to actual field observations. The results of the comparison are used to recommend various methods for estimating haul fleet production. The 5 methods were authored by: 1. R. L. Peurifoy, as interpreted by Atcheson, 2. F. H. Griffis, 3. M. Gates and A. Scarpa, 4. R. E. Phelps and 5. J. J. Adrian and L. T. Boyer. Atcheson's method is generally conservative, which is not necessarily in this application. The Phelps method seemed to be the …