Operational Research: Methods and Applications

Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first aims to summarise the up-to-date knowledge and provide an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion. It should be used as a point of reference or first-port-of-call for a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order. The authors dedicate this paper to the 2023 Turkey/Syria earthquake victims. We sincerely hope that advances in OR will play a role towards minimising the pain and suffering caused by this and future catastrophes

Atıkların geri kazanımı için çok seviyeli ve dinamik kapasiteli tesis yer seçimi problemi.

Waste Electrical and Electronic Equipment (WEEE) Directive became a European Union Law in February, 2003. Turkey introduced an akin regulation in May, 2013 to give original manufacturers of electrical and electronic equipment the responsibility of making provisions for the collection and recovery of wastes. Due to the lack of existing infrastructure for recovery, studies related to recovery networks are supposed to increase in Turkey following the relevant regulation. In this study, we formulate a mathematical model for the dynamic capacitated facility location problem with two-echelons consisting of collection, consolidation and disassembly centers. The proposed model determines the locations and opening times of the centers, expansion of capacities as well as the transportation of returns from collection centers to disassembly centers through consolidation centers. Since the proposed model is difficult to be solved in reasonable times, we develop a heuristic approach decomposing the original problem into subproblems by the rolling horizon approach and invoking Lagrangean relaxation and variable neighborhood search in each subproblem. After solving all subproblems deriving from the rolling horizon approach, the original problem with the reduced solution space is solved the solution of which is the final solution of the proposed heuristic. The proposed heuristic approach is tested on a set of problems that we generate. The computational results show that the commercial solvers can be time-consuming even for moderate size problems whereas the proposed heuristic can find solutions for large scale problems with a reasonable optimality gap in much less time than the commercial solvers.M.S. - Master of Scienc

Corrigendum to “A multi-objective rolling horizon personnel routing and scheduling approach for natural disasters”:[Transp. Res. Part C: Emerg. Technol. 149 (2023) 104029]

The authors regret that due to mistyping, the doi address (in Section 6.2 and Acknowledgement) providing information regarding to the location of the demand points and the initial/base location of the disaster response personnel is incorrect. The correct doi address is https://doi.org/10.17635/lancaster/researchdata/596. The authors would like to apologise for any inconvenience caused

Operational research : methods and applications

Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first aims to summarise the up-to-date knowledge and provide an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion. It should be used as a point of reference or first-port-of-call for a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order

Operational research: methods and applications

Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first aims to summarise the up-to-date knowledge and provide an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion. It should be used as a point of reference or first-port-of-call for a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order. The authors dedicate this paper to the 2023 Turkey/Syria earthquake victims. We sincerely hope that advances in OR will play a role towards minimising the pain and suffering caused by this and future catastrophes