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European Journal of Operational Research
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3.81
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20014
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#1Nan Zhang (BIT: Beijing Institute of Technology)
#1Nan ZhangH-Index: 3
Last. Jun Zhang
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Abstract This paper deals with condition-based maintenance policy of a K-out-of-N deteriorating system with failure dependence. The intrinsic degradation of each component is modelled with a pure jump Levy process. The idea of the failure dependence is motivated by complex engineering systems where the failure of one component may cause a momentary, transient shock to the system. The effect of the shock is modelled by a random magnitude of increment in the degradation level of each surviving com...
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Abstract Recent research introduces a methodology for constructing composite indicators, called σ − μ efficiency analysis, illustrating its potential in a case study of world happiness. Building on the landmark research paper, we propose a novel model that allows statistical inference for both weights in the composite indicator as well as inefficiency, fully accounting for outliers in the data and unit-specific heterogeneity in weights. The new techniques are based on Bayesian analysis via Marko...
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#1Adria Soriano (University of Vienna)H-Index: 1
#2Thibaut VidalH-Index: 20
Last. Karl F. Doerner (University of Vienna)H-Index: 40
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Abstract Efficiency and security are the two major concerns in cash-in-transit transportation planning. Whereas efficiency is generally achieved by finding short routes, security can be improved by generating dissimilar visit patterns. To achieve a good balance between these two objectives, the vehicle routing problem with arrival time diversification (VRPATD) aims to find optimized routing plans, over multiple periods, subject to a minimum difference between visit times at each customer. Since ...
1 CitationsSource
Abstract This study addresses the Ambulance Location and Dispatching Problem (ALDP), which jointly determines the location of available ambulances and their dispatching policy. The latter takes the form of a dispatching list that defines, for each zone of the covered territory, an ordered list providing a hierarchy of ambulances to be chosen whenever a call arrives. While decisions concerning the ambulance locations are of a tactical nature and often based on static information (i.e. average dem...
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Abstract In this paper, we present a column generation based decomposition method for the parallel batch scheduling of jobs on identical parallel machines. Jobs have different release dates, processing times and sizes while machines have limited capacity. The objective is the minimization of total flow time, i.e., sum of completion times of all processed jobs. The straightforward mixed integer linear programming model of the problem is efficient for small size instances. To deal with larger inst...
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#1Thomas Setzer (Catholic University of Eichstätt-Ingolstadt)H-Index: 1
#2Sebastian M. BlancH-Index: 2
Abstract This corrigendum presents corrected results regarding computational times, objective values and intrinsic dimensionalities reported in Section 5 (Computational Evaluation Design) of the above referenced manuscript and revises conclusions drawn from the section. While we are confident that the manuscript’s primary contribution, the mathematical derivation of the EOCG model, is correct and EOCG has been correctly implemented, errors in the code used to control the computational analysis a...
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#1Xingheng Liu (University of Technology of Troyes)H-Index: 1
#2Maxim FinkelsteinH-Index: 22
Last. Yann Dijoux (NTNU: Norwegian University of Science and Technology)H-Index: 1
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Abstract Imperfect maintenance models are widely used in reliability engineering. This paper discusses relevant asymptotic properties for the steady-state virtual age processes. It is shown that the limiting distributions of age, the residual lifetime and the spread that describe an ordinary renewal process can be generalized to the stable virtual age process, although the cycles of the latter are not independent. Asymptotic distributions of the virtual age at time t, as well as of the virtual a...
1 CitationsSource
Abstract We propose an exact solution method for a Logistics Service Network Design Problem (LSNDP) inspired by the management of restaurant supply chains. In this problem, a distributor seeks to source and fulfill customer orders of products (fruits, meat, napkins, etc.) through a multi-echelon distribution network consisting of supplier locations, warehouses, and customer locations in a cost-effective manner. As these products are small relative to vehicle capacity, an effective strategy for a...
1 CitationsSource
#1Zhenyu CuiH-Index: 13
#2Michael C. FuH-Index: 40
Last. Lingjiong ZhuH-Index: 11
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Abstract We consider estimating an expected infinite-horizon cumulative discounted cost/reward contingent on an underlying stochastic process by Monte Carlo simulation. An unbiased estimator based on truncating the cumulative cost at a random horizon is proposed. Explicit forms for the optimal distributions of the random horizon are given, and explicit expressions for the optimal random truncation level are obtained, leading to a full analysis of the bias-variance tradeoff when comparing this ne...
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#1Juuso Liesiö (Aalto University)H-Index: 12
#2Juho Andelmin (Aalto University)H-Index: 2
Last. Ahti Salo (Aalto University)H-Index: 34
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Abstract Efficiency analysis is widely employed to evaluate decision making units (DMUs) which convert input resources into outputs. In this paper, we develop models for allocating these resources to DMUs in order to maximize the overall efficiency of the portfolio formed by these DMUs. Our models do not require complete preference information about how valuable the inputs and outputs are relative to each other. Rather, based on incomplete preference information and explicit assumptions about th...
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