A Two-Queue Polling Model with a Threshold Service Policy. - Onno J. Boxma; Ger Koole; Isi Mitrani (MASCOTS, 1995)

Scheduling a repairman in a finite source system. - Ger Koole; Martin Vrijenhoek (Math. Methods Oper. Res., 1996)

On the Pathwise Optimal Bernoulli Routing Policy for Homogeneous Parallel Servers. - Ger Koole (Math. Oper. Res., 1996)

On the Use of the Power Series Algorithm for General Markov Processes, with an Application to a Petri Net. - Ger Koole (INFORMS J. Comput., 1997)

Optimal control in light traffic Markov decision processes. - Ger Koole; Olaf Passchier (Math. Methods Oper. Res., 1997)

Asigning a Single Server to Inhomogeneous Queues with Switching Costs. - Ger Koole (Theor. Comput. Sci., 1997)

Structural results for the control of queueing systems using event-based dynamic programming. - Ger Koole (Queueing Syst. Theory Appl., 1998)

Optimal control of tandem reentrant queues. - Ger Koole; Rhonda Righter (Queueing Syst. Theory Appl., 1998)

On the static assignment to parallel servers. - Ger Koole (IEEE Trans. Autom. Control., 1999)

Scheduling time-constrained jobs in the presence of background traffic. - Sandjai Bhulai; Ger Koole (CDC, 2000)

Stochastic scheduling with event-based dynamic programming. - Ger Koole (Math. Methods Oper. Res., 2000)

On the convergence of the power series algorithm. - Gerard Hooghiemstra; Ger Koole (Perform. Evaluation, 2000)

On the value function of a priority queue with an application to a controlled polling model. - Ger Koole; Philippe Nain (Queueing Syst. Theory Appl., 2000)

On the value of learning for Bernoulli bandits with unknown parameters. - Sandjai Bhulai; Ger Koole (IEEE Trans. Autom. Control., 2000)

Optimal Transmission Policies for Noisy Channels. - Ger Koole; Zhen Liu 001; Rhonda Righter (Oper. Res., 2001)

On optimal call admission control in resource-sharing system. - Eitan Altman; Tania Jiménez; Ger Koole (IEEE Trans. Commun., 2001)

Queueing Models of Call Centers: An Introduction. - Ger Koole; Avishai Mandelbaum (Ann. Oper. Res., 2002)

On the bias vector of a two-class preemptive priority queue. - Robin Groenevelt; Ger Koole; Philippe Nain (Math. Methods Oper. Res., 2002)

Customer relations management: call center operations: routing heuristics for multi-skill call centers. - Ger Koole; Auke Pot; Jerome Talim (WSC, 2003)

Telephone Call Centers: Tutorial, Review, and Research Prospects. - Noah Gans; Ger Koole; Avishai Mandelbaum (Manuf. Serv. Oper. Manag., 2003)

A queueing model for call blending in call centers. - Sandjai Bhulai; Ger Koole (IEEE Trans. Autom. Control., 2003)

Dynamic Load Balancing for a Grid Application. - Menno Dobber; Ger Koole; Robert D. van der Mei (HiPC, 2004)

Performance Analysis and Optimization in Customer Contact Centers. - Ger Koole (QEST, 2004)

Scaling and comparison of fluid limits of queues applied to call centers with time-varying parameters. - Tania Jiménez; Ger Koole (OR Spectr., 2004)

An Explicit Solution for the Value Function of a Priority Queue. - Ger Koole; Philippe Nain (Queueing Syst. Theory Appl., 2004)

Dynamic load balancing experiments in a grid. - Menno Dobber; Ger Koole; Robert D. van der Mei (CCGRID, 2005)

Message delay in MANET. - Robin Groenevelt; Philippe Nain; Ger Koole (SIGMETRICS, 2005)

Approximate dynamic programming in multi-skill call centers. - Ger Koole; Auke Pot (WSC, 2005)

Special issue in honor of Arie Hordijk Editorial introduction. - Lodewijk C. M. Kallenberg; Ger Koole; Flos Spieksma (Math. Methods Oper. Res., 2005)

The message delay in mobile ad hoc networks. - Robin Groenevelt; Philippe Nain; Ger Koole (Perform. Evaluation, 2005)

Statistical Properties of Task Running Times in a Global-Scale Grid Environment. - Menno Dobber; Robert D. van der Mei; Ger Koole (CCGRID, 2006)

Effective Prediction of Job Processing Times in a Large-Scale Grid Environment. - Menno Dobber; Robert D. van der Mei; Ger Koole (HPDC, 2006)

Workload minimization in re-entrant lines. - Ger Koole; Auke Pot (Eur. J. Oper. Res., 2006)

Monotonicity in Markov Reward and Decision Chains: Theory and Applications. - Ger Koole (Found. Trends Stoch. Syst., 2006)

Approximating multi-skill blocking systems by HyperExponential Decomposition. - Geert Jan Franx; Ger Koole; Auke Pot (Perform. Evaluation, 2006)

A prediction method for job runtimes on shared processors: Survey, statistical analysis and new avenues. - Menno Dobber; Robert D. van der Mei; Ger Koole (Perform. Evaluation, 2007)

On the Optimization of Resource Utilization in Distributed Multimedia Applications. - Ran Yang; Robert D. van der Mei; Dennis Roubos; Frank J. Seinstra; Ger Koole (CCGRID, 2008)

Modeling "Just-in-Time" Communication in Distributed Real-Time Multimedia Applications. - Ran Yang; Robert D. van der Mei; Dennis Roubos; Frank J. Seinstra; Ger Koole; Henri E. Bal (CCGRID, 2008)

Introduction to the Special Issue on Call Center Management. - Ger Koole (Manag. Sci., 2008)

Simple Methods for Shift Scheduling in Multiskill Call Centers. - Sandjai Bhulai; Ger Koole; Auke Pot (Manuf. Serv. Oper. Manag., 2008)

A Simple Staffing Method for Multiskill Call Centers. - Auke Pot; Sandjai Bhulai; Ger Koole (Manuf. Serv. Oper. Manag., 2008)

Resource allocation in grid computing. - Ger Koole; Rhonda Righter (J. Sched., 2008)

Revenue Management in the Parking Industry: New Business Opportunities. - Rob van der Mei; Kevin Pak; Maarten Soomer; Ger Koole (ERCIM News, 2009)

Dynamic Load Balancing and Job Replication in a Global-Scale Grid Environment: A Comparison. - Menno Dobber; Robert D. van der Mei; Ger Koole (IEEE Trans. Parallel Distributed Syst., 2009)

Dimensioning hospital wards using the Erlang loss model. - Arnoud M. de Bruin; René Bekker; Lillian van Zanten; Ger Koole (Ann. Oper. Res., 2010)

Optimising a general repair kit problem with a service constraint. - Marco Bijvank; Ger Koole; Iris F. A. Vis (Eur. J. Oper. Res., 2010)

Online scheduling policies for multiclass call centers with impatient customers. - Oualid Jouini; Auke Pot; Ger Koole; Yves Dallery (Eur. J. Oper. Res., 2010)

TECHNICAL NOTE - A Note on Profit Maximization and Monotonicity for Inbound Call Centers. - Ger Koole; Auke Pot (Oper. Res., 2011)

Queues with waiting time dependent service. - René Bekker; Ger Koole; Bo Friis Nielsen; Thomas Bang Nielsen (Queueing Syst. Theory Appl., 2011)

Dynamic control of a single-server system with abandonments. - Douglas G. Down; Ger Koole; Mark E. Lewis (Queueing Syst. Theory Appl., 2011)

Appointment scheduling using optimisation via simulation. - Paulien Koeleman; Ger Koole (WSC, 2012)

First in Line Waiting Times as a Tool for Analysing Queueing Systems. - Ger Koole; Bo Friis Nielsen; Thomas Bang Nielsen (Oper. Res., 2012)

Service-Level Variability of Inbound Call Centers. - Alex Roubos; Ger Koole; Raik Stolletz (Manuf. Serv. Oper. Manag., 2012)

Staffing a call center with uncertain non-stationary arrival rate and flexibility. - Shuangqing Liao; Ger Koole; Christian van Delft; Oualid Jouini (OR Spectr., 2012)

Call Center Optimization. - Ger Koole (MG Books, 2013)

A method for estimation of redial and reconnect probabilities in call centers. - Sihan Ding; Ger Koole; Rob van der Mei (WSC, 2013)

A comprehensive simulation modeling of an emergency department: a case study for simulation optimization of staffing levels. - Karim Ghanes; Oualid Jouini; Zied Jemaï; Mathias Wargon; Romain Hellmann; Valérie Thomas; Ger Koole (WSC, 2014)

Dynamic Call Center Routing Policies Using Call Waiting and Agent Idle Times. - Wyean Chan; Ger Koole; Pierre L'Ecuyer (Manuf. Serv. Oper. Manag., 2014)

On the estimation of the true demand in call centers with redials and reconnects. - Sihan Ding; Ger Koole; Robert D. van der Mei (Eur. J. Oper. Res., 2015)

Revenue management under customer choice behaviour with cancellations and overbooking. - D. D. Sierag; G. M. Koole; Robert D. van der Mei; J. I. van der Rest; Bert Zwart (Eur. J. Oper. Res., 2015)

Simulation-based optimization of staffing levels in an emergency department. - Karim Ghanes; Mathias Wargon; Oualid Jouini; Zied Jemaï; Agapitos Diakogiannis; Romain Hellmann; Valérie Thomas; Ger Koole (Simul., 2015)

Optimal scheduling in call centers with a callback option. - Benjamin Legros; Oualid Jouini; Ger Koole (Perform. Evaluation, 2016)

A Uniformization Approach for the Dynamic Control of Queueing Systems with Abandonments. - Benjamin Legros; Oualid Jouini; Ger Koole (Oper. Res., 2018)

Buffering locations in retail deliveries. - Dmitrii Erkin; Elenna R. Dugundji; Ger Koole; Joaquim A. S. Gromicho; Rob van der Mei (ANT/EDI40, 2019)

A Comparative Study of State-of-the-Art Machine Learning Algorithms for Predictive Maintenance. - Luis P. Silvestrin; Mark Hoogendoorn; Ger Koole (SSCI, 2019)

A Simple Solution for Optimizing Weekly Agent Scheduling in a Multi-Skill Multi-Channel Contact Center. - Siqiao Li; Ger Koole; Oualid Jouini (WSC, 2019)

Front-office multitasking between service encounters and back-office tasks. - Benjamin Legros; Oualid Jouini; O. Zeynep Aksin; Ger Koole (Eur. J. Oper. Res., 2020)

A practice-oriented overview of call center workforce planning. - Ger Koole; Siqiao Li (CoRR, 2021)

A machine learning approach to itinerary-level booking prediction in competitive airline markets. - Daniel Hopman; Ger Koole; Rob van der Mei (CoRR, 2021)

Data-Driven Market Segmentation in Hospitality Using Unsupervised Machine Learning. - Rik van Leeuwen; Ger Koole (CoRR, 2021)

Should We Wait Before Outsourcing? Analysis of a Revenue-Generating Blended Contact Center. - Benjamin Legros; Oualid Jouini; Ger Koole (Manuf. Serv. Oper. Manag., 2021)

Transfer-Learning Across Datasets with Different Input Dimensions: An Algorithm and Analysis for the Linear Regression Case. - Luis Pedro Silvestrin; Harry van Zanten; Mark Hoogendoorn; Ger Koole (CoRR, 2022)

The slow-server problem with multiple slow servers. - Ger Koole (Queueing Syst. Theory Appl., 2022)

Modeling COVID-19 hospital admissions and occupancy in the Netherlands. - René Bekker; Michiel A. J. uit het Broek; Ger Koole (Eur. J. Oper. Res., 2023)

Call center data analysis and model validation. - Ger Koole; Siqiao Li; Sihan Ding (Queueing Syst. Theory Appl., 2025)

Churn management in hospitality. - Rik van Leeuwen; Hieu Duc Do; Ger Koole (J. Big Data, 2025)