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A mathematical formulation and complexity considerations for the blocks relocation problem
Caserta, Marco; Schwarze, Silvia; Voß, Stefan - In: European Journal of Operational Research 219 (2012) 1, pp. 96-104
The blocks relocation problem (BRP) may be defined as follows: given a set of homogeneous blocks stored in a two-dimensional stock, which relocations are necessary to retrieve the blocks from the stock in a predefined order while minimizing the number of those relocations? In this paper, we...
Persistent link: https://www.econbiz.de/10011052786
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Parallel machine scheduling with additional resources: Notation, classification, models and solution methods
Edis, Emrah B.; Oguz, Ceyda; Ozkarahan, Irem - In: European Journal of Operational Research 230 (2013) 3, pp. 449-463
Majority of parallel machine scheduling studies consider machine as the only resource. However, in most real … studies on the parallel machine scheduling problems with additional resources. Papers are surveyed in five main categories …
Persistent link: https://www.econbiz.de/10010679128
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Operations research in the space industry
Fliege, Jörg; Kaparis, Konstantinos; Khosravi, Banafsheh - In: European Journal of Operational Research 217 (2012) 2, pp. 233-240
Operations research techniques have been used in the space industry since its infancy, and various competing methods and codes, with widely varying characteristics, have been used over time. This survey is intended to give an overview of current application cases of different operations research...
Persistent link: https://www.econbiz.de/10011052596
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A mixed integer linear programming approach to minimize the number of late jobs with and without machine availability constraints
Detienne, Boris - In: European Journal of Operational Research 235 (2014) 3, pp. 540-552
This study investigates scheduling problems that occur when the weighted number of late jobs that are subject to …
Persistent link: https://www.econbiz.de/10011052690
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Flow shop scheduling with heterogeneous workers
Benavides, Alexander J.; Ritt, Marcus; Miralles, Cristóbal - In: European Journal of Operational Research 237 (2014) 2, pp. 713-720
We propose an extension to the flow shop scheduling problem named Heterogeneous Flow Shop Scheduling Problem (Het … corresponding scheduling problem. This problem is motivated by Sheltered Work centers for Disabled, whose main objective is the … the production managers with practical approaches for this combined assignment and scheduling problem. …
Persistent link: https://www.econbiz.de/10011097742
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Improving the computational efficiency of metric-based spares algorithms
Nowicki, David R.; Randall, Wesley S.; Ramirez-Marquez, … - In: European Journal of Operational Research 219 (2012) 2, pp. 324-334
of performance-based logistics (PBL) has increased. PBL represents a class of business strategies that converts the …-based approaches to evaluate how a supplier and customer will engage in a performance based logistics arrangement where spares …
Persistent link: https://www.econbiz.de/10010871190
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A goal-driven prototype column generation strategy for the multiple container loading cost minimization problem
Wei, Lijun; Zhu, Wenbin; Lim, Andrew - In: European Journal of Operational Research 241 (2015) 1, pp. 39-49
In the multiple container loading cost minimization problem (MCLCMP), rectangular boxes of various dimensions are loaded into rectangular containers of various sizes so as to minimize the total shipping cost. The MCLCMP can be naturally modeled as a set cover problem. We generalize the set cover...
Persistent link: https://www.econbiz.de/10010939772
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The economic lot-sizing problem with an emission capacity constraint
Retel Helmrich, Mathijn J.; Jans, Raf; van den Heuvel, Wilco - In: European Journal of Operational Research 241 (2015) 1, pp. 50-62
We consider a generalisation of the lot-sizing problem that includes an emission capacity constraint. Besides the usual financial costs, there are emissions associated with production, keeping inventory and setting up the production process. Because the capacity constraint on the emissions can...
Persistent link: https://www.econbiz.de/10010939788
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Characterization of the split closure via geometric lifting
Basu, Amitabh; Molinaro, Marco - In: European Journal of Operational Research 243 (2015) 3, pp. 745-751
We analyze split cuts from the perspective of cut generating functions via geometric lifting. We show that α-cuts, a natural higher-dimensional generalization of the k-cuts of Cornuéjols et al., give all the split cuts for the mixed-integer corner relaxation. As an immediate consequence we...
Persistent link: https://www.econbiz.de/10011209330
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Optimal selection of project portfolios using reinvestment strategy within a flexible time horizon
Jafarzadeh, M.; Tareghian, H.R.; Rahbarnia, F.; Ghanbari, R. - In: European Journal of Operational Research 243 (2015) 2, pp. 658-664
In this paper, we address the issue of optimal selection of portfolio of projects using reinvestment strategy within a flexible time horizon. We assume that an investor intends to invest his/her initial capital on the implementation of some projects in a flexible time horizon. The investor’s...
Persistent link: https://www.econbiz.de/10011209412