Walter J. Gutjahr

According to our database, Walter J. Gutjahr authored at least 79 papers between 1991 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

Risk-Averse Bargaining in a Stochastic Optimization Context.

Walter J. Gutjahr, Raimund M. Kovacevic, David Wozabal

Manuf. Serv. Oper. Manag., January, 2023

2022

A branch-and-Benders-cut algorithm for a bi-objective stochastic facility location problem.

Sophie N. Parragh, Fabien Tricoire, Walter J. Gutjahr

OR Spectr., 2022

Stochastic radiotherapy appointment scheduling.

Roland Braune, Walter J. Gutjahr, Petra Vogl

Central Eur. J. Oper. Res., 2022

Bi-objective facility location under uncertainty with an application in last-mile disaster relief.

Najmesadat Nazemi, Sophie N. Parragh, Walter J. Gutjahr

Ann. Oper. Res., 2022

Bi-objective Risk-averse Facility Location using a Subset-based Representation of the Conditional Value-at-Risk.

Najmesadat Nazemi, Sophie N. Parragh, Walter J. Gutjahr

Proceedings of the 11th International Conference on Operations Research and Enterprise Systems, 2022

2021

Inequity-averse stochastic decision processes.

Walter J. Gutjahr

Eur. J. Oper. Res., 2021

2020

Innovative approaches in humanitarian operations.

Walter J. Gutjahr, Nilay Noyan, Nico Vandaele, Luk N. Van Wassenhove

OR Spectr., 2020

Bi-objective facility location in the presence of uncertainty.

Najmesadat Nazemi, Sophie N. Parragh, Walter J. Gutjahr

CoRR, 2020

2019

Stochastic project management: multiple projects with multi-skilled human resources.

Thomas Felberbauer, Walter J. Gutjahr, Karl F. Doerner

J. Sched., 2019

Inequity-averse shelter location for disaster preparedness.

Mahdi Mostajabdaveh, Walter J. Gutjahr, F. Sibel Salman

IISE Trans., 2019

Uncertainty, economics and optimization: recent developments.

Walter J. Gutjahr, Alois Pichler

Comput. Manag. Sci., 2019

2018

Equity and deprivation costs in humanitarian logistics.

Walter J. Gutjahr, Sophie Fischer

Eur. J. Oper. Res., 2018

2017

Efficient pairwise preference elicitation allowing for indifference.

Jürgen Branke, Salvatore Corrente, Salvatore Greco, Walter J. Gutjahr

Comput. Oper. Res., 2017

Modelling beneficiaries' choice in disaster relief logistics.

Christian Burkart, Pamela C. Nolz, Walter J. Gutjahr

Ann. Oper. Res., 2017

2016

Bi-objective stochastic programming models for determining depot locations in disaster relief operations.

Stefan Rath, Michel Gendreau, Walter J. Gutjahr

Int. Trans. Oper. Res., 2016

Multicriteria optimization in humanitarian aid.

Walter J. Gutjahr, Pamela C. Nolz

Eur. J. Oper. Res., 2016

Stochastic multi-objective optimization: a survey on non-scalarizing methods.

Walter J. Gutjahr, Alois Pichler

Ann. Oper. Res., 2016

2015

Bi-Objective Multi-Mode Project Scheduling Under Risk Aversion.

Walter J. Gutjahr

Eur. J. Oper. Res., 2015

Using Indifference Information in Robust Ordinal Regression.

Jürgen Branke, Salvatore Corrente, Salvatore Greco, Walter J. Gutjahr

Proceedings of the Evolutionary Multi-Criterion Optimization, 2015

2014

A math-heuristic for the warehouse location-routing problem in disaster relief.

Stefan Rath, Walter J. Gutjahr

Comput. Oper. Res., 2014

2012

Runtime Analysis of an Evolutionary Algorithm for Stochastic Multi-Objective Combinatorial Optimization.

Walter J. Gutjahr

Evol. Comput., 2012

The bi-objective stochastic covering tour problem.

Fabien Tricoire, Alexandra Graf, Walter J. Gutjahr

Comput. Oper. Res., 2012

Exact hybrid algorithms for solving a bi-objective vehicle routing problem.

Peter Reiter, Walter J. Gutjahr

Central Eur. J. Oper. Res., 2012

A Three-Objective Optimization Approach to Cost Effectiveness Analysis Under Uncertainty.

Walter J. Gutjahr

Proceedings of the Operations Research Proceedings 2012, 2012

2011

Optimal dynamic portfolio selection for projects under a competence development model.

Walter J. Gutjahr

OR Spectr., 2011

Special issue on optimization in disaster relief.

Karl F. Doerner, Walter J. Gutjahr, Luk N. Van Wassenhove

OR Spectr., 2011

Recent trends in metaheuristics for stochastic combinatorial optimization.

Walter J. Gutjahr

Central Eur. J. Comput. Sci., 2011

Ant Colony Optimization: Recent Developments in Theoretical Analysis.

Walter J. Gutjahr

Proceedings of the Theory of Randomized Search Heuristics: Foundations and Recent Developments., 2011

2010

A Bi-objective Metaheuristic for Disaster Relief Operation Planning.

Pamela C. Nolz, Karl F. Doerner, Walter J. Gutjahr, Richard F. Hartl

Proceedings of the Advances in Multi-Objective Nature Inspired Computing, 2010

Convergence Analysis of Metaheuristics.

Walter J. Gutjahr

Proceedings of the Matheuristics - Hybridizing Metaheuristics and Mathematical Programming, 2010

Dynamic Policy Modeling for Chronic Diseases: Metaheuristic-Based Identification of Pareto-Optimal Screening Strategies.

Marion S. Rauner, Walter J. Gutjahr, Kurt Heidenberger, Joachim Wagner, Joseph M. Pasia

Oper. Res., 2010

Multi-objective decision analysis for competence-oriented project portfolio selection.

Walter J. Gutjahr, Stefan Katzensteiner, Peter Reiter, Christian Stummer, Michaela Denk

Eur. J. Oper. Res., 2010

2009

Multi-criteria location planning for public facilities in tsunami-prone coastal areas.

Karl F. Doerner, Walter J. Gutjahr, Pamela C. Nolz

OR Spectr., 2009

A survey on metaheuristics for stochastic combinatorial optimization.

Leonora Bianchi, Marco Dorigo, Luca Maria Gambardella, Walter J. Gutjahr

Nat. Comput., 2009

A multicriteria Decision Support System for Competence-Driven Project Portfolio Selection.

Christian Stummer, Elmar Kiesling, Walter J. Gutjahr

Int. J. Inf. Technol. Decis. Mak., 2009

A provably convergent heuristic for stochastic bicriteria integer programming.

Walter J. Gutjahr

J. Heuristics, 2009

2008

Search-based software engineering.

Walter J. Gutjahr, Mark Harman

Comput. Oper. Res., 2008

First steps to the runtime complexity analysis of ant colony optimization.

Walter J. Gutjahr

Comput. Oper. Res., 2008

Competence-driven project portfolio selection, scheduling and staff assignment.

Walter J. Gutjahr, Stefan Katzensteiner, Peter Reiter, Christian Stummer, Michaela Denk

Central Eur. J. Oper. Res., 2008

2007

Mathematical runtime analysis of ACO algorithms: survey on an emerging issue.

Walter J. Gutjahr

Swarm Intell., 2007

Multicriteria tour planning for mobile healthcare facilities in a developing country.

Karl Doerner, Axel Focke, Walter J. Gutjahr

Eur. J. Oper. Res., 2007

An ACO algorithm for a dynamic regional nurse-scheduling problem in Austria.

Walter J. Gutjahr, Marion S. Rauner

Comput. Oper. Res., 2007

Combined Discrete-event Simulation and Ant Colony Optimisation Approach for Selecting Optimal Screening Policies for Diabetic Retinopathy.

Sally C. Brailsford, Walter J. Gutjahr, Marion S. Rauner, Wolfgang Zeppelzauer

Comput. Manag. Sci., 2007

A VNS Algorithm for Noisy Problems and Its Application to Project Portfolio Analysis.

Walter J. Gutjahr, Stefan Katzensteiner, Peter Reiter

Proceedings of the Stochastic Algorithms: Foundations and Applications, 2007

2006

Enriched workflow modelling and Stochastic Branch-and-Bound.

Karl F. Doerner, Walter J. Gutjahr, Gabriele Kotsis, Martin Polaschek, Christine Strauss

Eur. J. Oper. Res., 2006

Pareto ant colony optimization with ILP preprocessing in multiobjective project portfolio selection.

Karl F. Doerner, Walter J. Gutjahr, Richard F. Hartl, Christine Strauss, Christian Stummer

Eur. J. Oper. Res., 2006

Interaction dynamics of two reinforcement learners.

Walter J. Gutjahr

Central Eur. J. Oper. Res., 2006

2005

Two Metaheuristics for Multiobjective Stochastic Combinatorial Optimization.

Walter J. Gutjahr

Proceedings of the Stochastic Algorithms: Foundations and Applications, 2005

2004

Pareto Ant Colony Optimization: A Metaheuristic Approach to Multiobjective Portfolio Selection.

Karl F. Doerner, Walter J. Gutjahr, Richard F. Hartl, Christine Strauss, Christian Stummer

Ann. Oper. Res., 2004

S-ACO: An Ant-Based Approach to Combinatorial Optimization Under Uncertainty.

Walter J. Gutjahr

Proceedings of the Ant Colony Optimization and Swarm Intelligence, 2004

An ant system approach to Markov decision processes.

Hyeong Soo Chang, Walter J. Gutjahr, Jihoon Yang, Sungyong Park

Proceedings of the 2004 American Control Conference, 2004

2003

A Converging ACO Algorithm for Stochastic Combinatorial Optimization.

Walter J. Gutjahr

Proceedings of the Stochastic Algorithms: Foundations and Applications, 2003

Extracting Test Sequences from a Markov Software Usage Model by ACO.

Karl Doerner, Walter J. Gutjahr

Proceedings of the Genetic and Evolutionary Computation, 2003

2002

ACO algorithms with guaranteed convergence to the optimal solution.

Walter J. Gutjahr

Inf. Process. Lett., 2002

Using a Reliability Growth Model to Control Software Inspection.

Stefan Biffl, Walter J. Gutjahr

Empir. Softw. Eng., 2002

A branch-and-bound approach to the optimization of redundant software under failure correlation.

Walter J. Gutjahr, Gabriele Uchida

Comput. Oper. Res., 2002

2001

A reliability model for nonhomogeneous redundant software versions with correlated failures.

Walter J. Gutjahr

Comput. Syst. Sci. Eng., 2001

Influence Of Team Size And Defect Detection Technique On Inspection Effectiveness.

Stefan Biffl, Walter J. Gutjahr

Proceedings of the 7th IEEE International Software Metrics Symposium (METRICS 2001), 2001

2000

Software dependability evaluation based on Markov usage models.

Walter J. Gutjahr

Perform. Evaluation, 2000

Representation and optimization of software usage models with non-Markovian state transitions.

Karl Doerner, Walter J. Gutjahr

Inf. Softw. Technol., 2000

A Stochastic Branch-and-Bound Approach to Activity Crashing in Project Management.

Walter J. Gutjahr, Christine Strauss, Eric W. Wagner

INFORMS J. Comput., 2000

A Graph-based Ant System and its convergence.

Walter J. Gutjahr

Future Gener. Comput. Syst., 2000

Crashing of stochastic processes by sampling and optimisation.

Walter J. Gutjahr, Christine Strauss, Martin Tóth

Bus. Process. Manag. J., 2000

1999

Partition Testing vs. Random Testing: The Influence of Uncertainty.

Walter J. Gutjahr

IEEE Trans. Software Eng., 1999

Optimal stochastic single-machine-tardiness scheduling by stochastic branch-and-bound.

Walter J. Gutjahr, A. Hellmayr, Georg Ch. Pflug

Eur. J. Oper. Res., 1999

1998

Reliability optimization of redundant software with correlated failures.

Walter J. Gutjahr

Proceedings of the Ninth International Symposium on Software Reliability Engineering, 1998

1997

Task Assignment in Cayley Interconnection Topologies.

Walter J. Gutjahr, Martin Hitz, Thomas A. Mück

Parallel Comput., 1997

An improved algorithm for finding minimum-risk 3-state-device networks.

Walter J. Gutjahr, Ch. E. Wöber

Int. J. Comput. Math., 1997

1996

Simulated Annealing for noisy cost functions.

Walter J. Gutjahr, Georg Ch. Pflug

J. Glob. Optim., 1996

Failure Risk Estimation via Markov Software Usage Models.

Walter J. Gutjahr

Proceedings of the 15th International Conference on Computer Safety, 1996

1995

Optimal Test Distributions for Software Failure Cost Estimation.

Walter J. Gutjahr

IEEE Trans. Software Eng., 1995

1994

Connection Reliabilities in Stochastic Acyclic Networks.

Walter J. Gutjahr

Random Struct. Algorithms, 1994

A global optimization problem in series-parallel networks with maximum reliability.

Walter J. Gutjahr

J. Glob. Optim., 1994

1993

Expectation Transfer between Branching Processes and Random Trees.

Walter J. Gutjahr

Random Struct. Algorithms, 1993

Automatische Testdatengenerierung zur Unterstützung des Softwaretests.

Walter J. Gutjahr

Inform. Forsch. Entwickl., 1993

1992

The Variance of Level Numbers in Certain Families of Trees.

Walter J. Gutjahr

Random Struct. Algorithms, 1992

The limiting common distribution of two leaf heights in a random brinary tree.

Walter J. Gutjahr, Georg Ch. Pflug

RAIRO Theor. Informatics Appl., 1992

The asymptotic distribution of leaf heights in binary trees.

Walter J. Gutjahr, Georg Ch. Pflug

Graphs Comb., 1992

1991

Uniform random generation of expressions respecting algebraic identities.

Walter J. Gutjahr

Computing, 1991