Minimizing fuel emissions by optimizing vessel schedules in liner shipping with uncertain port times

Minimizing fuel emissions by optimizing vessel schedules in liner shipping with uncertain port times

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Article ID: iaor20123537
Volume: 48
Issue: 4
Start Page Number: 863
End Page Number: 880
Publication Date: Jul 2012
Journal: Transportation Research Part E
Authors: ,
Keywords: vehicle routing & scheduling, combinatorial optimization
Abstract:

We consider the problem of designing an optimal vessel schedule in the liner shipping route to minimize the total expected fuel consumption (and emissions) considering uncertain port times and frequency requirements on the liner schedule. The general optimal scheduling problem is formulated and tackled by simulation‐based stochastic approximation methods. For special cases subject to the constraint of 100% service level, we prove the convexity and continuous differentiability of the objective function. Structural properties of the optimal schedule under certain conditions are obtained with useful managerial insights regarding the impact of port uncertainties. Case studies are given to illustrate the results.

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