Mathematical solutions for solving periodic railway transportation.
Salido, Miguel A., Barber, Federico (2009)
Mathematical Problems in Engineering
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Salido, Miguel A., Barber, Federico (2009)
Mathematical Problems in Engineering
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Cor A.J. Hurkens (2009)
RAIRO - Operations Research
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Linear programming techniques can be used in constructing schedules but their application is not trivial. This in particular holds true if a trade-off has to be made between computation time and solution quality. However, it turns out that – when handled with care – mixed integer linear programs may provide effective tools. This is demonstrated in the successful approach to the benchmark constructed for the 2007 ROADEF computation challenge on scheduling problems furnished by France...
Najafi, Amir Abbas, Azimi, Fatemeh (2009)
Mathematical Problems in Engineering
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Nabil Absi, Safia Kedad-Sidhoum (2007)
RAIRO - Operations Research
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We address a multi-item capacitated lot-sizing problem with setup times that arises in real-world production planning contexts. Demand cannot be backlogged, but can be totally or partially lost. Safety stock is an objective to reach rather than an industrial constraint to respect. The problem is NP-hard. We propose mixed integer programming heuristics based on a planning horizon decomposition strategy to find a feasible solution. The planning horizon is partitioned into several sub-horizons...