Abstract

A ship fleet management problem is described which concerns the phasing out of a fleet of general cargo ships over a 10-year period with the possibility of premature sale and temporary replacement by charter ships. The objective is to determine a sale and replacement policy which maximizes long term company assets. The problem is tackled by selecting a priority order for sale and determining the optimal rate of replacement by dynamic programming. The method has been programmed and demonstrated good returns and is in current use by a shipping company for a variety of management functions.

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