Omega

1973 - 2025

Current editor(s): B. Lev

From Elsevier
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Volume 58, issue C, 2016

The directional distance function and the translation invariance property pp. 1-3

Juan Aparicio, Jesus Pastor and Fernando Vidal Giménez

Staffing and scheduling under nonstationary demand for service: A literature review pp. 4-25

Mieke Defraeye and Inneke Van Nieuwenhuyse

Optimal sourcing from alternative capacitated suppliers with general cost structures pp. 26-32

Tarkan Tan and Osman Alp

Research fronts in data envelopment analysis pp. 33-45

John S. Liu, Louis Y.Y. Lu and Wen-Min Lu

DEANN: A healthcare analytic methodology of data envelopment analysis and artificial neural networks for the prediction of organ recipient functional status pp. 46-54

Nicholas Misiunas, Asil Oztekin, Yao Chen and Kavitha Chandra

A multiobjective model and evolutionary algorithms for robust time and space assembly line balancing under uncertain demand pp. 55-68

Manuel Chica, Joaquín Bautista, Óscar Cordón and Sergio Damas

Moving towards an equitable long-term care network: A multi-objective and multi-period planning approach pp. 69-85

Teresa Cardoso, Monica Oliveira, Ana Barbosa-Póvoa and Stefan Nickel

Dynamic efficiency in the English and Welsh water and sewerage industry pp. 86-96

Charlotte Pointon and Kent Matthews

Approaches to a real-world Train Timetabling Problem in a railway node pp. 97-110

Valentina Cacchiani, Fabio Furini and Martin Philip Kidd

Correct accounting for duty drawbacks with outward and inward processing in global production networks pp. 111-127

Marius Häntsch and Arnd Huchzermeier

Emergency Department Management in Lazio, Italy pp. 128-138

Gianmaria Leo, Andrea Lodi, Paolo Tubertini and Mirko Di Martino

Pitfalls of decomposition weights in the additive multi-stage DEA model pp. 139-153

Sheng Ang and Chien-Ming Chen

A nested-compliance table policy for emergency medical service systems under relocation pp. 154-168

Kanchala Sudtachat, Maria E. Mayorga and Laura A. Mclay

Volume 57, issue PB, 2015

User reward programs in online social media pp. 123-144

Fouad H. Mirzaei, Fredrik Ødegaard and Xinghao Yan

Appointment scheduling in tandem-type service systems pp. 145-156

Alex Kuiper and Michel Mandjes

Parking slot assignment for urban distribution: Models and formulations pp. 157-175

Mireia Roca-Riu, Elena Fernández and Miquel Estrada

Profit-oriented productivity change pp. 176-187

Jia-Ching Juo, Tsu-Tan Fu, Ming-Miin Yu and Yu-Hui Lin

Checking the consistency of the solution in ordinal semi-democratic decision-making problems pp. 188-195

Fiorenzo Franceschini and Domenico Maisano

Structural properties of time-dependent scheduling problems with the lp norm objective pp. 196-202

Stanisław Gawiejnowicz and Wiesław Kurc

An improved MIP heuristic for the intermodal hub location problem pp. 203-211

Yan He, Tao Wu, Canrong Zhang and Zhe Liang

Approximate solution of a profit maximization constrained virtual business planning problem pp. 212-216

Alexandre Dolgui, Sergey Kovalev and Erwin Pesch

Improving spare parts inventory control at a repair shop pp. 217-229

Willem van Jaarsveld, Twan Dollevoet and Rommert Dekker

A robust voting machine allocation model to reduce extreme waiting pp. 230-237

Muer Yang, Wang, Xinfang (Jocelyn) and Nuo Xu

Order batching in a pick-and-pass warehousing system with group genetic algorithm pp. 238-248

Jason Chao-Hsien Pan, Po-Hsun Shih and Ming-Hung Wu

Equilibrium pricing sequence in a co-opetitive supply chain with the ODM as a downstream rival of its OEM pp. 249-270

Baozhuang Niu, Yulan Wang and Pengfei Guo

Supply vessel planning under cost, environment and robustness considerations pp. 271-281

Ellen Karoline Norlund, Irina Gribkovskaia and Gilbert Laporte

Multi-criteria group individual research output evaluation based on context-free grammar judgments with assessing attitude pp. 282-293

Zongmin Li, Jiuping Xu, Benjamin Lev and Jun Gang

Volume 57, issue PA, 2015

A multiple objective optimization based QFD approach for efficient resilient strategies to mitigate supply chain vulnerabilities: The case of garment industry of Bangladesh☆,☆☆☆This manuscript was processed by Associate Editor B. Lev pp. 5-21

Md. Maruf Hossan Chowdhury and Mohammed A. Quaddus

Dual sourcing and backup production: Coexistence versus exclusivity pp. 22-33

He Huang and Hongyan Xu

Portfolio optimization in hedge funds by OGARCH and Markov Switching Model pp. 34-39

Cuicui Luo, Luis Seco and Lin-Liang Bill Wu

Risk averse supply portfolio selection with supply, demand and spot market volatility pp. 40-53

Yasemin Merzifonluoglu

When does operational risk cause supply chain enterprises to tip? A simulation of intra-organizational dynamics pp. 54-69

Benjamin Guertler and Stefan Spinler

Climate policy modeling: An online SCI-E and SSCI based literature review pp. 70-84

Yi-Ming Wei, Zhifu Mi and Zhimin Huang

An experimental study on the effects of minimum profit share on supply chains with markdown contract: Risk and profit analysis pp. 85-97

Pui-Sze Chow, Yulan Wang, Tsan-Ming Choi and Bin Shen

Supply chain risk mitigations with expedited shipping pp. 98-113

Lian Qi and Kangbok Lee

Reprint of “Decision support for risks managers in the case of deliberate food contamination: The dairy industry as an example” pp. 114-122

Beate Pinior, Franz J. Conraths, Brigitte Petersen and Thomas Selhorst

Volume 56, issue C, 2015

Strategic transfer pricing in a marketing–operations interface with quality level and advertising dependent goodwill pp. 1-15

Guowei Liu, Jianxiong Zhang and Wansheng Tang

An enhanced BAM for unbounded or partially bounded CRS additive models pp. 16-24

Jesus Pastor, Juan Aparicio, Javier Alcaraz, Fernando Vidal Giménez and Diego Pastor

Fix-and-optimize and variable neighborhood search approaches for multi-level capacitated lot sizing problems pp. 25-36

Haoxun Chen

Coordinating a supply chain for deteriorating items with a revenue sharing and cooperative investment contract pp. 37-49

Jianxiong Zhang, Guowei Liu, Qiao Zhang and Zhenyu Bai

An improvement on “Integrated production strategy and reuse scenario: A CoFAQ model and case study of mail server system development” pp. 50-52

Zhiqiao Wu, Jiafu Tang, C.K. Kwong and F. Marinelli

Resilience metrics in the assessment of complex supply-chains performance operating under demand uncertainty pp. 53-73

Sónia R. Cardoso, Ana Paula Barbosa-Póvoa, Susana Relvas and Augusto Q. Novais

Two-stage DEA models with undesirable input-intermediate-outputs pp. 74-87

Wenbin Liu, Zhongbao Zhou, Chaoqun Ma, Debin Liu and Wanfang Shen

An iterated local search with multiple perturbation operators and time varying perturbation strength for the aircraft landing problem pp. 88-98

Nasser R. Sabar and Graham Kendall

When cost–effective design strategies are not enough: Evidence from an experimental study on the role of redundant goals pp. 99-111

Izack Cohen and Michal Iluz

Managing stochastic demand in an Inventory Routing Problem with transportation procurement pp. 112-121

Luca Bertazzi, Adamo Bosco and Demetrio Laganà

DEA for non-homogenous parallel networks pp. 122-132

Juan Du, Yao Chen and Jiazhen Huo

Volume 55, issue C, 2015

Time-staged outputs in DEA pp. 1-9

Sonia Avilés Sacoto, David Güemes Castorena, Wade D. Cook and Humberto Cantú Delgado

Logic-based Benders decomposition for an inventory-location problem with service constraints pp. 10-23

David Wheatley, Fatma Gzara and Elizabeth Jewkes

Vehicle routing–scheduling for municipal waste collection system under the “Keep Trash off the Ground” policy pp. 24-37

Shan-Huen Huang and Pei-Chun Lin

Integrated retail decisions with multiple selling periods and customer segments: Optimization and insights pp. 38-52

Ahmed Ghoniem and Bacel Maddah

A note on the facility location problem with stochastic demands pp. 53-60

Milena Bieniek

Optimizing real-time vehicle sequencing of a paint shop conveyor system pp. 61-72

Mirza M. Lutfe Elahi, Karthik Rajpurohit, Jay M. Rosenberger, Gergely Zaruba and John Priest

Minimizing takeoff and landing risk in helicopter pickup and delivery operations pp. 73-80

Irina Gribkovskaia, Oyvind Halskau and Mikhail Y. Kovalyov

The consensus models with interval preference opinions and their economic interpretation pp. 81-90

Zaiwu Gong, Xiaoxia Xu, Huanhuan Zhang, U. Aytun Ozturk, Enrique Herrera-Viedma and Chao Xu

Supplier competition and its impact on firm׳s sourcing strategy pp. 91-110

Lian Qi, Shi, Jim (Junmin) and Xiaowei Xu

Maximizing customer equity subject to capacity constraints pp. 111-125

Robert Klein and Johannes Kolb

Robust multi-criteria sorting with the outranking preference model and characteristic profiles pp. 126-140

Miłosz Kadziński, Tommi Tervonen and José Rui Figueira

An illustration of dynamic network DEA in commercial banking including robustness tests pp. 141-150

Necmi Kemal Avkiran