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Title: Scheduling trans-shipment operations in maritime chemical transportation
Authors: Huang, C.
Karimi, I.A. 
Issue Date: 15-Mar-2006
Citation: Huang, C., Karimi, I.A. (2006-03-15). Scheduling trans-shipment operations in maritime chemical transportation. Industrial and Engineering Chemistry Research 45 (6) : 1955-1973. ScholarBank@NUS Repository.
Abstract: Trans-shipment or direct ship-to-ship transfer of bulk liquid cargos for regional distribution is a routine activity in maritime chemical logistics. Efficient scheduling of trans-shipment operations is economically crucial, because of the expensive multiparcel carriers. In this work, we consider a general chemical trans-shipment problem, in which multiple donor carriers trans-ship several chemical cargos to multiple recipient carriers. We develop nine continuous-time mixed-integer linear programming (MILP) formulations of three types for determining the optimal sequences, positions, and timings for unloading various cargos. Two of these models using the big-M relaxation to solve several test problems with reasonable speed, but their performance varies with the numbers of two-sided cargos and ships. For even larger problems, we simplify our rigorous model heuristically using a cargo aggregation assumption, which reduces the formulation size tremendously and decreases model solution times by ∼2 orders of magnitude, yet gives near-optimal solutions. © 2006 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
DOI: 10.1021/ie050840s
Appears in Collections:Staff Publications

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