Showing papers in "International Transactions in Operational Research in 2004"

TL;DR: In this paper, the authors explored the role of geographical information systems in the decision support process of where to locate a retail outlet in a multi-outlet chain and the use of Voronoi diagrams in store trade area delimitation.

TL;DR: A simulated annealing method for the CLP is developed, which is then combined with an existing tabu search algorithm to form a hybrid metaheuristic, and parallel versions are introduced for these algorithms.

TL;DR: In this article, the authors describe a Prolog application which helps the decision-maker to build a consistent matrix or a matrix with a controlled error, and give hints on how to continue the comparison process.

TL;DR: A new algorithm for the stochastic unit commitment problem which is based on column generation approach is proposed which continues adding schedules from the dual solution of the restricted linear master program until the algorithm cannot generate new schedules.

TL;DR: In this paper, a combination of analysis hierarchical process (AHP) and data envelopment analysis (DEA) is proposed for the assessment of the efficiency of R&D management activities in universities.

TL;DR: In this paper, the authors present a system dynamics approach for the analysis of the demand amplification problem, also known as the bullwhip effect, which has been studied fairly extensively in the literature.

TL;DR: A solution method for the log-truck scheduling problem, which is a generalisation of the pick-up and delivery problem with time windows, is proposed based on column generation and pseudo branch and price and solved by applying a k-shortest path algorithm.

TL;DR: In this article, the location of primary public schools in the state of Vitoria, Brazil was investigated using ArcView, a software of the geographic information system (GIS) family.

TL;DR: In this paper, a two-stage stochastic integer programming (SILP) is used to obtain an optimum policy in the capacity expansion planning of a particular thermal-electric power system, which includes the existent uncertainty related to the future availability of the thermal plants currently under operation.

TL;DR: In this paper, an integer linear programming model to assign the meal contracts, in a process known as combinatorial auctions, led to significant improvements in efficiency and also contributed to making the process more transparent, which resulted in substantial improvements in quality and coverage of the service, and important savings to the country, which are equivalent to feeding 300,000 children.

TL;DR: The study shows how the multi-criteria decision-making method could facilitate implementation of healthcare performance analysis, especially for the public healthcare system of Bangladesh, which operates mainly through thana health complexes (THCs).

TL;DR: This article examined the effectiveness of the multiple-choice method in measuring human perception and found that the choice of a second-best alternative is independent of the difference in the degree of importance between the best and the second best.

TL;DR: The AHP model approach allows users to input judgments as to how they feel about one celebrity compared to another with a specific set of criteria in mind and is an improvement over the Q-rating system because it includes a more complete set of attributes and has the ability to capture and analyse trade-offs among those attributes.

TL;DR: This work proposes a general architecture for operational research problems, specified for vehicle routing problems, that encourages object-oriented programming and code reuse and creates an instance of this architecture for the unmanned aerial vehicle routing problem.

TL;DR: In this paper, the authors consider a network of periodically running railway lines and derive a cost-benefit analysis of investments, where the benefit is measured in reduced waiting time for passengers changing lines.

TL;DR: It is shown that embryos, pronuclei and oocytes consist at least of two types: those suitable for procreation and those not suitable and both types can be recognised easily by an automatic procedure at whatever stage is desired.

TL;DR: The main objective of TollSim is to start building an infrastructure and infostructure to be used in a decision support system for management of traffic related issues in a technologically excluded region.

TL;DR: Convergence of branch-and-bound algorithms for the solution of NLPs is obtained by finding ever-nearer lower and upper bounds to the objective function.

TL;DR: A group of forty five decision makers worked together for sixteen months, with a facilitator group, to identify relevant criteria to analyze the consequences of a plant location and synthesizes the difficulties and results of the Multi-Criteria Decision Aid intervention.

TL;DR: A model is presented that develops the Quality Function Deployment (QFD) House of Quality tool into a fuzzy-set based multi-criteria decision-making process to determine the distributions of effort directed toward technical changes.

TL;DR: This case study reports a prospective evaluation process for a major research program for the Finnish forestry and forest industries based on fifteen participatory workshops and analyzes the preconditions, advantages, and limitations of similar kinds of participatory processes in the implementation of formative and summative evaluations.

TL;DR: A quantitative method for evaluating the stable connectedness of the network-structured system using shortest-path-counting methods and the application of the Monte Carlo method to estimate the expected stable-connection function is proposed.

TL;DR: The Australian adverse drug reactions database is derived from 140,000 reports over 30 years, including many instances of multiple drugs and multiple reactions as discussed by the authors, and so the drug-reaction table is large and sparse.

TL;DR: A graph theoretic heuristic to determine an efficient service route for a single service vehicle through a transportation network that requires a subset of its edges to be serviced, each a specified ( potentially different) number of times.

TL;DR: Some refinements on a branch- and bound-scheme for solving the minimization of open stack problem (MOSP) produce substantial savings in computational time when the MOSP graph presents some special structures.

TL;DR: In this paper, a semi-Markov model and its application for designing and sizing swine facilities are presented, which is useful to determine more accurately the capacity, improve farm design and reduce housing cost.

TL;DR: In this paper, the authors present a study of the Portuguese financial sector during the period 1994-1999, focusing on the productivity paradox of information systems and technology (IST) investments, examining the services sector and including the human subsystem of an organisation, clients and employees.

TL;DR: This paper addresses the three-machine flowshop scheduling problem with a bicriteria of minimizing a weighted sum of makespan and total flowtime with three lower bounds, an upper bound, and several dominance relations.

TL;DR: In this article, the authors present two formal models of ethnic conflicts: an agent-based model of ethnic mobilization and a system-dynamics model of societal conflicts, based on recent social-science theories of preconditions, causes, and dynamics of ethnic violence and on experience in the former Yugoslavia in the last two decades.