Vehicle routing with soft time windows and Erlang travel times

R A Russell and T L Urban ()
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R A Russell: The University of Tulsa
T L Urban: The University of Tulsa

Journal of the Operational Research Society, 2008, vol. 59, issue 9, 1220-1228

Abstract: Abstract This paper investigates vehicle-routing problems in which the travel times are random variables, and deliveries are made subject to soft time-window constraints. In particular, we model the travel time using a shifted gamma distribution. Penalties are incurred for deviations from the customers' time windows—early or late—and are developed using a fixed cost, a linear cost penalty, and/or a quadratic loss penalty. Alternatively, specifying a given probability of meeting the time-window constraints is considered. A tabu-search metaheuristic is developed, and computational results on test problems from the literature are reported.

Keywords: stochastic vehicle routing; metaheuristics; time-window constraints (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (21)

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DOI: 10.1057/palgrave.jors.2602465

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