Showing papers in "International Transactions in Operational Research in 2007"

TL;DR: For 73 instances of the RCPSP, the RES found better solutions than the best ones found so far and the results for the DRCMPSP instances show that the presented decentralized MAS is competitive with a central solution approach.

TL;DR: Two competing approaches for the measurement of efficiency are the stochastic frontier model and data envelopment analysis and a panel data DEA model that uses averaged data has been shown to effectively smooth out measurement error.

TL;DR: The GDP-gap, a production index and the money supply M1 in combination with some financial health indicators for individual firms are found to be significant predictors on default for Norwegian firms during both a recovery and expansion in the 1990's.

TL;DR: This work describes a project selection methodology developed and used since 1998 for Mighty River Power, a New Zealand electricity generator, which incorporates the ELECTRE III decision support tool.

TL;DR: It is found that age and ownership have positive and statistically significant effects on its technical inefficiency, and these new findings contribute significantly to educational performance.

TL;DR: This model can identify weakly efficient units of evaluation that could not be identified by the previous models and is applied to the data from the banking industry and compared with those of the previous two-stage DEA models.

TL;DR: This article addresses the problem of modeling data envelopment analysis (DEA) inefficiencies as dependent on contextual variables by using a statistical model similar in appearance to inefficiency component specifications in stochastic frontier models.

TL;DR: This paper aims to show how, through a real-world example, overall supply chain costs can be minimised under those circumstances and provides Tectrol Inc., a manufacturer of power supplies, some general guidelines on distribution and supply chain decisions in the NAFTA context.

TL;DR: This work applies generalizations of the proportional intensities model introduced by Cox to five sets of reliability data collected from the main pumps at oil refineries, and develops algorithms for simulating the reliability behaviour of a complex repairable system into the future.

TL;DR: Estimates of relative efficiency and productive performance of 13 colleges at the University of Santo Tomas (UST), using data envelopment analysis (DEA) – Malmquist indices and a multi-stage model imply that UST colleges as a whole have recorded a higher level of technical efficiency than innovation.

TL;DR: The economic order (manufacture) quantity model with learning and forgetting has attracted the attention of researchers since the 1960s but all the models developed have limitations, which will be addressed in this article.

TL;DR: The present paper uses analytic hierarchy process (AHP) to reassign criteria weights from a Malaysian perspective and proposes an alternative one based upon the absolute measurement procedure of AHP to enhance the fairness in evaluation of the award aspirants.

TL;DR: A column generation algorithm to calculate new improved lower bounds to the solution of maximal covering location problems formulated as a p-median problem, where the reduced cost criterion used at the column selection is modified by a Lagrangean/surrogate multiplier.

TL;DR: An integer programming model and its genetic algorithm solution procedure is proposed that allows express couriers, such as UPS, FedEx, and DHL, to maximize their profit generated by direct home deliveries.

TL;DR: The improvement of interconnection capacity and the increase of power reserve are identified as key requirements for ensuring the security of supply and a clear understanding of all these aspects is fundamental for integrated, multidimensional wind power planning.

TL;DR: The meta-heuristics development framework (MDF) is proposed, which decomposes algorithms into a set of well-defined modules that can be flexibly assembled through a centralized controller and can hence be used to design and implement a wide spectrum of hybrids with varying degrees of collaboration.

TL;DR: A mathematical network model and the modelling features of two software tools for designing underground mine layouts that minimise associated costs are described and an efficient decline is found using the decline optimisation tool.

TL;DR: There is evidence to support the use of holons for enquiry purposes and that the holons provide a structure for both soft and hard systems modeling.

TL;DR: A new procedure for removing the influence of site characteristics is presented, which is a vital step in performing efficiency analysis when DMUs operate under significantly different conditions.

TL;DR: This paper presents integer programming formulations and compares two approaches – weighting and lexicographic – to the multi-objective, long-term production scheduling in make-to-order manufacturing, where both maximization of customer service level and best utilization of production resources are integrated in the objective function.

TL;DR: This work finds the extremal graphs or gives good bounds for this index when the number nk of vertices of degree kis n−k+t, for 0tk and kn/2 and proves that for nkn−k, (kn/2) the minimum value of the Randic index is attained for the graph.

TL;DR: This paper presents a method for comparative efficiency analysis to improve the accountability of CWS to their stakeholders while maintaining the level of service and is a significant departure from the current planning and management approach.

TL;DR: This paper presents a new approach using nonparametric statistical tests to examine a frontier shift and determine the number of periods to include in an intertemporal analysis.

TL;DR: The results of this paper quantitatively clarify the evaluation of projects and the characteristic of sectors, and it is concluded that 35% of local government projects should be devolved from the public sector to alternative sectors.

TL;DR: Determining and understanding the demands of stakeholders may lead to a successful management of environmental, social, human, and economic tasks and a multicriteria approach is proposed to formulate a planning problem as a multiobjective optimization problem.

TL;DR: In this paper, the polytope of the minimum-span graph labelling problem with integer distance constraints (DC-MSGL) is studied and a branch-and-cut algorithm for solving the problem is presented.

TL;DR: Slice is a threat-response multi-criteria decision model that systematically evaluates the threats and responses of securing the states and territories and uses probability calibration and entropy methods to obtain a composite weighted score for each state and territory.

TL;DR: This work employs a model that adopts marketing notions such as market shares and ideal points to dictate the attraction of the product to consumers and facilitates the existence of a Nash equilibrium in prices and product positions.

TL;DR: A regime-switching model to describe the exchange rate dynamics is derived as solution to a stochastic control problem and allows the determination of an endogenous tolerance band within which the exchange rates freely fluctuates.

TL;DR: It is concluded that given that models with the spatial queue representation are more realistic in capturing the queuing dynamics at intersections they should be incorporated in the decision-making process for initiating priority calls in a TSP system.