Blar i Discussion papers (FOR) på forfatter "Bredström, David"
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A branch and price algorithm for the combined vehicle routing and scheduling problem with synchronization constraints
Bredström, David; Rönnqvist, Mikael (Discussion paper, Working paper, 2007)In this paper we present a branch and price algorithm for the combined vehicle routing and scheduling problem with synchronization constraints. The synchronization constraints are used to model situations when two or more ... -
Combined vehicle routing and scheduling with temporal precedence and synchronization constraints
Bredström, David; Rönnqvist, Mikael (Discussion paper, Working paper, 2006)We present a mathematical programming model for the combined vehicle routing and scheduling problem with time windows and additional temporal constraints. The temporal constraints allow for imposing pairwise synchronization ... -
Searching for optimal integer solutions to set partitioning problems using column generation
Bredström, David; Jörnsten, Kurt; Rönnqvist, Mikael (Discussion paper;20/07, Working paper, 2007-08)We describe a new approach to produce integer feasible columns to a set partitioning problem directly in solving the linear programming (LP) relaxation using column generation. Traditionally, column generation is aimed ... -
Supply Chain Optimization in Pulp Distribution using a Rolling Horizon Solution Approach
Bredström, David; Rönnqvist, Mikael (Discussion paper, Working paper, 2006)In this paper we consider a combined supply chain and ship routing problem for a large pulp producer in Scandinavia. The problem concerns the distribution of pulp to customers, with route scheduling of ships as a central ...