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William W. Cooper, Lawrence M. Seiford and Joe Zhu, International Series in Operations Research and Management Science, Kluwer Academic Publishers (2004) ISBN 1-4020-7797-1.

Antunes, Carlos Henggeler
Fonte: Universidade de Coimbra Publicador: Universidade de Coimbra
Tipo: Artigo de Revista Científica Formato: aplication/PDF
ENG
Relevância na Pesquisa
55.52%
http://www.sciencedirect.com/science/article/B6VCT-4H5MYKH-2/1/bf179b8d1aaef093ac239034f1fde514

Operations research/management science tools for integrating people with disabilities into employment. A study on Valencia`s Sheltered Work Centres for Disabled

MIRALLES, Cristobal; MARIN-GARCIA, Juan A.; FERRUS, Gabriel; COSTA, Alysson M.
Fonte: WILEY-BLACKWELL Publicador: WILEY-BLACKWELL
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
55.73%
People with disabilities have a right to a full life in every sense and one of those fundamental rights is the possibility to work. In this paper, the importance of social employment integration of disabled people is highlighted as one of the stakeholders to be satisfied by companies in the new framework that corporate social responsibility is constructing. The objective of the paper is to revise the benefits of some well-known operations research/management science tools that, if applied correctly, have a double positive impact on work accessibility and improved productivity. The responses collected from managers of Valencia`s ShelteredWork Centres for Disabled by means of a structured questionnaire are used to analyse the level of implementation of these tools and their impact depending on the type of centre, the kind of disability and other structural variables.; Regional Valencian Government (Spain)[GVA 2007-241]; Regional Valencian Government (Spain); CNPq Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Brazil)[561672/2008-3]; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Temas e práticas de pesquisa em gestão de operações; Themes and research practices in operations management

Figueiredo, Jeovan de Carvalho; Teodósio, Armindo dos Santos de Sousa; Gonçalves-Dias, Sylmara Lopes Francelino
Fonte: Editora da Universidade Federal da Paraíba - UFPB; João Pessoa Publicador: Editora da Universidade Federal da Paraíba - UFPB; João Pessoa
Tipo: Artigo de Revista Científica
POR
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45.85%
A Gestão de Operações tem sido caracterizada pela sobreposição temática com as áreas da Administração e da Engenharia de Produção. Nesse sentido, a proposta deste artigo é analisar os temas e práticas investigativas científicas adotadas por pesquisadores que publicaram em periódicos de cada uma dessas duas áreas, entre os anos de 2010 e 2012. Foram analisados 258 artigos publicados neste período, a partir de técnicas de estatística descritiva e análise de agrupamentos de palavras-chave. Os resultados mostraram que predomina, no campo da Administração, a pesquisa aplicada, enquanto que no campo da Engenharia de Produção, predomina a avaliação de resultados. Contudo, os temas de interesse identificados neste estudo são particularmente comuns nos periódicos analisados, revelando que a Gestão de Operações é efetivamente uma área com forte inserção tanto no campo científico da Administração quanto da Engenharia de Produção; Operations management has been characterized by a thematic overlap between the areas of management science and production engineering science. In this sense, the purpose of this article is to analyze themes and research practices adopted by researchers who published articles related to these two fields between the years 2010 and 2012. We analyzed 258 articles published during this period...

A faster strongly polynomial minimum cost flow algorithm

Fonte: Massachusetts Institute of Technology, Operations Research Center Publicador: Massachusetts Institute of Technology, Operations Research Center
Formato: 11 leaves; 1368245 bytes; application/pdf
ENG
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55.59%
by James B. Orlin.; Also issued as: Working Paper (Sloan School of Management) ; WP 2042-88; Includes bibliographical references (leaf 11).; Supported by a National Science Foundation Presidential Young Investigator Grant. 8451517-ECS Supported by the Air Force Office of Scientific Research, Analog Devices, Apple Computer, and Prime Computer.

Improved time bounds for the maximum flow problem

Fonte: Massachusetts Institute of Technology, Operations Research Center Publicador: Massachusetts Institute of Technology, Operations Research Center
Formato: 19 p.; 1410022 bytes; application/pdf
ENG
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55.6%
by Ravindra K. Ahuja, James B. Orlin and Robert E. Tarjan.; Also issued as: Working paper (Sloan School of Management) ; WP no. 1966-87; Includes bibliographical references (p. 18-19).; Research supported by the National Science Foundation. DCR-8605962 Research supported by the Office of Naval Research. NOOO14-87-K-0467

Fisheries Management and Operations Research

ARNASON Ragnar
Fonte: ELSEVIER SCIENCE BV Publicador: ELSEVIER SCIENCE BV
Tipo: Articles in Journals Formato: Online
ENG
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55.74%
Fisheries are subject to a deep-rooted problem of economic inefficiency, often referred to as the fisheries problem. The fisheries problem derives fundamentally from inappropriate social institutions controlling the fishing activity, the foremost of which is the common property arrangement. Fisheries management consists of replacing these institutions with more appropriate ones. Which institutions are most appropriate depends on the social objectives of the fisheries. There are strong economic arguments for the view that there should be only a single objective, namely to maximize the present value of the flow of benefits from the fisheries. In reality, different interest groups often push for several, often conflicting, objectives. In that case a multi-objective programming approach may be appropriate. A set of institutions to manage fisheries is referred to as the fisheries management regime. The fisheries management regime consists of a (i) fisheries management system, (ii) fisheries enforcement system and (iii) fisheries judicial system. Each one of these has to be appropriately designed and implemented. The efficacy of the overall fisheries management regime cannot be greater than that of its weakest link. At the same time it is of the greatest importance to keep an eye on the cost of fisheries management. Global evidence suggests that the cost of fisheries management often constitutes a substantial fraction of the value of the harvest. The problem...

Operations research in disaster preparedness and response: The public health perspective

STILIANAKIS Nikolaos; CONSOLI SERGIO
Fonte: Publications Office of the European Union Publicador: Publications Office of the European Union
Tipo: EUR - Scientific and Technical Research Reports Formato: Online
ENG
Relevância na Pesquisa
45.79%
Operations research is the scientific study of operations for the purpose of better decision making and management. Disasters are defined as events whose consequences exceed the capability of civil protection and public health systems to provide necessary responses in a timely manner. Public health science is applied to the design of operations of public health services and therefore operations research principles and techniques can be applied in public health. Disaster response quantitative methods such as operations research addressing public health are important tools for planning effective responses to disasters. Models address a variety of decision makers (e.g. first responders, public health officials), geographic settings, strategies modelled (e.g. dispensing, supply chain network design, prevention or mitigation of disaster effects, treatment) and outcomes evaluated (costs, morbidity, mortality, logistical outcomes) and use a range of modelling methodologies. Regarding natural disasters the modelling approaches have been rather limited. Response logistics related to public health impact of disasters have been modelled more intensively since decisions about procurement, transport, stockpiling, and maintenance of needed supplies but also mass vaccination...

Global Supply Chain Management at Digital Equipment Corporation

Arntzen, Bruce C.; Brown, Gerald G.; Harrison, Terry P.; Trafton, Linda L.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
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Interfaces, 25, pp. 69-93. (Nominated for the 1994 International Management Science Achievement Award.); Digital Equipment Corporation evaluates global supply chain alternatives and determines worldwide manufacturing and distribution strategy, using the Global Supply Chain Model (GSCM) which recommends a production, distribution, and vendor network,, GSCM minimizes cost or weighted cumulative production and distribution times or both subject to meeting estimated demand and restrictions on local content, offset trade, and joint capacity for multiple products, echelons, and time periods.Cost factors include fixed and variable production charges, inventory charges, distribution expenses via multiple modes, taxes, duties, and duty drawback. GSCM is a large mixed-integer linear program that incorporates a global, multiproduct bill of materials for supply chains with arbitrary echelon structure and comprehensive model of integrated global manufacturing and distribution decisions. The supply chain restructuring has saved over $100 million (US).

Search for a malevolent needle in a benign haystack

Gaver, D.P.; Jacobs, P.A.; Glazebrook, K. D.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Parte de Livro
Relevância na Pesquisa
65.58%
Chapter 6 in Game Theoretic Risk Analysis of Security Threats (eds. Bier, V. M. and Azaiez, M. N.) International Series in Operations Research and Management Science, Vol. 128, Springer, New York, 2009.; A domain contains a number w of non-hostile White (W) individuals: humans, vehicles, ships. A hostile Red (R) individual enters the domain and travels through the domain towards targets. If R reaches an attractive valuable target, perhaps a crowd of people on land or a ship at sea containing liquid natural gas (LNG), it attacks the target. A Blue counter-terrorist, C, patrols the domain and classifies (perhaps incorrectly) individuals of interest as R or W. The probability of correct classification is an increasing function of the time spent classifying an individual. The misclassification of a W as an R is a false positive; misclassification of the R as a W is a false negative. C follows (or tracks) any individual it classifies as R until it is relieved by another platform or individual that may neutralize the possible R. C is unable to detect and classify additional individuals while it is following a suspicious individual. A small classification time may yield many false positives that C must service. A large classification time may result in R achieving its goal before being neutralized...

Bilevel Network Interdiction Models: Formulations and Solutions

Wood, R. Kevin
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
65.58%
in Wiley Encyclopedia of Operations Research and Management Science.; The article of record as published may be located at http://dx.doi.org/10.1002/9780470400531.eorms0932

A Hilbert Space Approach to Variance Reduction

Szechtman, Roberto
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Parte de Livro
Relevância na Pesquisa
65.58%
Elsevier Handbooks in Operations Research and Management Science: Simulation, pp 259-289.; In this chapter we explain variance reduction techniques from the Hilbert space standpoint, in the terminating simulation context. We use projection ideas to explain how variance is reduced, and to link different variance reduction techniques. Our focus is on the methods of control variates, conditional Monte Carlo, weighted Monte Carlo, stratification, and Latin hypercube sampling.

ASP, Art and Science of Practice: Educating Military Operations Research Practitioners

Brown, Gerald G.; DeGrange, Walter C.; Dell, Robert F.; Fricker, Ronald D.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
65.69%
The article of record as published may be found at http://dx.doi.org/10.1287/inte.2014.0780; The 2013 UPS George D. Smith Prize was awarded to the Naval Postgraduate School’s (NPS) Operations Research (OR) department for “effective and innovative preparation of students to be good practitioners of operations research, management science, or analytics.” In the spirit of the prize, this paper shares details about our degree program. The program is closely linked to its military sponsor, the United States Department of Defense, in a unique relationship that ensures NPS students and faculty are focused on critical and important problems facing the military. Our students bring firsthand knowledge of the challenges our organization faces, and leave our academic program as OR practitioners prepared to immediately meet those challenges.

Educating Military Operations Research Practitioners

Brown, Gerald G.; DeGrange, Walter; Dell, Robert F.; Fricker, Ronald D., Jr.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
65.66%
The 2013 UPS George D. Smith Prize was awarded to the Naval Postgraduate School's (NPS) Operations Research (OR) department for “effective and innovative preparation of students to be good practitioners of operations research, management science or analytics.” In the spirit of the prize, this paper shares details about our degree program. NPS began offering a degree in OR in 1951, making it the first OR degree in the United States. The program is closely linked to its sponsor, the United States Department of Defense (DoD), in a unique relationship that ensures NPS students and faculty are focused on critical and important problems facing the military. Our students bring firsthand knowledge of the challenges our organization faces and leave our academic program as OR practitioners prepared to immediately meet these challenges.

Joint Program Executive Office for Chemical and Biological Defense collaboration study

Sadowski, Andre T.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xx, 65 p. ;
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55.65%
Approved for public release; distribution is unlimited.; The Joint Program Executive Office for Chemical Biological Defense (JPEO-CBD) is interested in how it can achieve a higher success rate of fielded items with its nine subordinate Program Management Offices. The Joint Science and Technology Office (JSTO) is the research, development, and technology organization that assesses all the new technologies that may eventually become fielded. The JPEO-CBD organization suspects that many of the research projects funded by JSTO are rarely fielded into actual Chemical Biological Defense (CBD) systems used by the end user. This study analyzes the results of a JPEO-CBD Questionnaire and compares those results to applicable JPEOCBD and JSTO technology statistics. The aim of this study is to analyze the quality of the agency relationships and how the relationships impact the probability of projects being fielded. This study shows a significant statistical relationship between the collaboration survey score of a JPM and its anticipated future transition to the warfighter. A similar result is true for the correlation between the historical percentage of technologies that transition to warfighter use and the JPM's collaboration survey score.

An analysis of the integrated mechanical diagnostics health and usage management system on rotor track and balance

Revor, Mark S.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xx, 80 p.
Relevância na Pesquisa
55.63%
Approved for public release, distribution is unlimited; This thesis is concerned with the operational benefit of the Integrated Mechanical Diagnostics Health and Usage Management Systems (IMD HUMS) rotor track and balance (RTB) functionality. The questions addressed are whether there is a savings in flight hours expended on functional check flights (FCF's) when compared to present practices, if there will there be a reduction in directed maintenance man-hours (DMMH) spent on maintenance related to the rotor system, and the impact on Operational Availability. Experiments were conducted using a discrete event simulation model of squadron flight operations and organizational level maintenance. The simulation is generic and can be used in the analysis of other helicopters. Input parameters governing the distributions of maintenance action inter-arrival times were estimated from Naval Aviation Logistics Data Analysis (NALDA) databases and squadron experiences on such systems. The analysis suggests that flight hours spent in FCF are dependent upon vibration growth rate, an unknown quantity, and the maintenance policy for rotor smoothing. Directed maintenance man-hours decrease with increasing numbers of IMD HUMS configured aircraft and further gains are achieved with a maintenance policy suited to a continuous monitoring system.; Captain...

Modeling short-range ballistic missile defense and Israel's Iron Dome system

Armstrong, Michael John
Fonte: Institute for Operations Research and Management Science (INFORMS) Publicador: Institute for Operations Research and Management Science (INFORMS)
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
65.58%
This paper develops a model of short-range ballistic missile defense and uses it to study the performance of Israel’s Iron Dome system. The deterministic base model allows for inaccurate missiles, unsuccessful interceptions, and civil defense. Model enhancements consider the trade-offs in attacking the interception system, the difficulties faced by militants in assembling large salvos, and the effects of imperfect missile classification by the defender. A stochastic model is also developed. Analysis shows that system performance can be highly sensitive to the missile salvo size, and that systems with higher interception rates are more “fragile” when overloaded. The model is calibrated using publically available data about Iron Dome’s use during Operation Pillar of Defense in November 2012. If the systems performed as claimed, they saved Israel an estimated 1778 casualties and $80 million in property damage, and thereby made preemptive strikes on Gaza about 8 times less valuable to Israel. Gaza militants could have inflicted far more damage by grouping their rockets into large salvos, but this may have been difficult given Israel’s suppression efforts. Counter-battery fire by the militants is unlikely to be worthwhile unless they can obtain much more accurate missiles.; Fulbright Canada...

Research status and trends in Operations Research and Management Science (OR/MS) journals: A bibliometric analysis based on the Web of Science database 2001-2012

Dorta-Gonzalez, Pablo; Dorta-Gonzalez, Maria Isabel; Santos-Penate, Dolores Rosa; Suarez-Vega, Rafael
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 17/10/2014
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95.73%
A bibliometric analysis to evaluate global scientific production in the subject category of Operations Research and Management Science (OR/MS) from 2001 to 2012 was applied. Data was based on the Web of Science (Science Citation Index) database compiled by Thomson Reuters. The results showed that the OR/MS research has significantly increased over the past twelve years. The Bradford core journals in the category were identified. The researchers paid great attention to networks, control, and simulation. Among the countries, USA attained a dominant position in global research in the field.; Comment: 21 pages, 4 figures and 5 tables

A Historical Analysis of the Field of OR/MS using Topic Models

Gatti, Christopher J.; Brooks, James D.; Nurre, Sarah G.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 17/10/2015
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55.52%
This study investigates the content of the published scientific literature in the fields of operations research and management science (OR/MS) since the early 1950s. Our study is based on 80,757 published journal abstracts from 37 of the leading OR/MS journals. We have developed a topic model, using Latent Dirichlet Allocation (LDA), and extend this analysis to reveal the temporal dynamics of the field, journals, and topics. Our analysis shows the generality or specificity of each of the journals, and we identify groups of journals with similar content, which are both consistent and inconsistent with intuition. We also show how journals have become more or less unique in their scope. A more detailed analysis of each journals' topics over time shows significant temporal dynamics, especially for journals with niche content. This study presents an observational, yet objective, view of the published literature from OR/MS that would be of interest to authors, editors, journals, and publishers. Furthermore, this work can be used by new entrants to the fields of OR/MS to understand the content landscape, as a starting point for discussions and inquiry of the field at large, or as a model for other fields to perform similar analyses.

From Predictive to Prescriptive Analytics

Bertsimas, Dimitris; Kallus, Nathan
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
55.64%
In this paper, we combine ideas from machine learning (ML) and operations research and management science (OR/MS) in developing a framework, along with specific methods, for using data to prescribe decisions in OR/MS problems. In a departure from other work on data-driven optimization and reflecting our practical experience with the data available in applications of OR/MS, we consider data consisting, not only of observations of quantities with direct effect on costs/revenues, such as demand or returns, but predominantly of observations of associated auxiliary quantities. The main problem of interest is a conditional stochastic optimization problem, given imperfect observations, where the joint probability distributions that specify the problem are unknown. We demonstrate that our proposed solution methods are generally applicable to a wide range of decision problems. We prove that they are computationally tractable and asymptotically optimal under mild conditions even when data is not independent and identically distributed (iid) and even for censored observations. As an analogue to the coefficient of determination $R^2$, we develop a metric $P$ termed the coefficient of prescriptiveness to measure the prescriptive content of data and the efficacy of a policy from an operations perspective. To demonstrate the power of our approach in a real-world setting we study an inventory management problem faced by the distribution arm of an international media conglomerate...

Using information on variations to improve health system performance: from measurement to management

Schang, Laura
Fonte: London School of Economics and Political Science Thesis Publicador: London School of Economics and Political Science Thesis
Tipo: Thesis; NonPeerReviewed Formato: text
Publicado em /05/2015 EN
Relevância na Pesquisa
55.56%
Although information on variations in healthcare utilisation is increasingly available, its constructive use to improve health systems is often hindered by the lack of a clear standard to evaluate what is “good“ and “poor“ performance. This thesis investigates how regulators and managers of the system might address this lack of a standard. The thesis distinguishes between the purpose (to manage ambiguity in the absence of a standard or to determine a meaningful standard) and the approach used to achieve either purpose (socio-political or technical-evidential). The resulting four types of strategies are examined by drawing on concepts and methods from public health and epidemiology, health economics, operations research and public administration and empirical evidence from England and Scotland. To manage ambiguity in the absence of a standard using a socio-political approach, the thesis finds that one must overcome a series of barriers including awareness, acceptance, perceived applicability and capacity of potential users. Clinical and managerial leadership appear to be enabling factors for the use of information on variations for strategic problem framing and stakeholder engagement. To manage ambiguity in the absence of a standard using a technical-evidential approach...