Abstract
Fuzzy optimization techniques can be applied in determining the optimal schedule for the transport of gravel by inland water transportation. Gravel demand, for example, is difficult to determine precisely since it depends on the industrial development of the regions supplied by gravel and on possible buyers. The duration of the annual navigation period varies depending on the water level, possible icebergs, heavy fog, strong and frequent wind. The transport company is usually satisfied if total transportation costs stay within a reasonable range. The formulation of a linear programme lacks flexibility in dealing with imprecise input data. In this paper this type of problem has been approached with fuzzy optimization techniques.
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