default search action
Ward Whitt
Person information
- affiliation: Columbia University, New York, NY, USA
- award (2003): Frederick W. Lanchester Prize
- award (2001): John von Neumann Theory Prize
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
showing all ?? records
2020 – today
- 2024
- [j201]Kerry W. Fendick, Ward Whitt:
On Gaussian Markov processes and Polya processes. Oper. Res. Lett. 52: 107062 (2024) - 2023
- [j200]Kerry W. Fendick, Ward Whitt:
Queueing networks with path-dependent arrival processes. Queueing Syst. Theory Appl. 105(1-2): 17-46 (2023) - 2022
- [j199]Ward Whitt, Wei You:
New decomposition approximations for queueing networks. Queueing Syst. Theory Appl. 100(3-4): 365-367 (2022) - [j198]Kerry W. Fendick, Ward Whitt:
Heavy traffic limits for queues with non-stationary path-dependent arrival processes. Queueing Syst. Theory Appl. 101(1-2): 113-135 (2022) - [j197]Yan Chen, Ward Whitt:
Applying optimization theory to study extremal GI/GI/1 transient mean waiting times. Queueing Syst. Theory Appl. 101(3-4): 197-220 (2022) - [j196]Yan Chen, Ward Whitt:
Correction to: Extremal GI/GI/1 queues given two moments: exploiting Tchebycheff systems. Queueing Syst. Theory Appl. 102(3-4): 553-556 (2022) - 2021
- [j195]Kerry W. Fendick, Ward Whitt:
Queues with path-dependent arrival processes. J. Appl. Probab. 58(2): 484-504 (2021) - [j194]Ward Whitt:
On the many-server fluid limit for a service system with routing based on delayed information. Oper. Res. Lett. 49(3): 316-319 (2021) - [j193]Yan Chen, Ward Whitt:
Extremal GI/GI/1 queues given two moments: exploiting Tchebycheff systems. Queueing Syst. Theory Appl. 97(1-2): 101-124 (2021) - 2020
- [j192]Yan Chen, Ward Whitt:
Extremal models for the GI∕GI∕K waiting-time tail-probability decay rate. Oper. Res. Lett. 48(6): 770-776 (2020) - [j191]Yan Chen, Ward Whitt:
Algorithms for the upper bound mean waiting time in the GI/GI/1 queue. Queueing Syst. Theory Appl. 94(3-4): 327-356 (2020) - [j190]Ward Whitt, Wei You:
Heavy-traffic limits for stationary network flows. Queueing Syst. Theory Appl. 95(1): 53-68 (2020) - [i3]Ward Whitt, Wei You:
A Robust Queueing Network Analyzer Based on Indices of Dispersion. CoRR abs/2003.11174 (2020)
2010 – 2019
- 2019
- [j189]Bo Sun, Xu Sun, Danny H. K. Tsang, Ward Whitt:
Optimal battery purchasing and charging strategy at electric vehicle battery swap stations. Eur. J. Oper. Res. 279(2): 524-539 (2019) - [j188]Ward Whitt, Xiaopei Zhang:
Periodic Little's Law. Oper. Res. 67(1): 267-280 (2019) - [j187]Ward Whitt, Wei You:
Time-Varying Robust Queueing. Oper. Res. 67(6): 1766-1782 (2019) - [j186]Ward Whitt, Wei You:
The advantage of indices of dispersion in queueing approximations. Oper. Res. Lett. 47(2): 99-104 (2019) - [j185]Ward Whitt, Xiaopei Zhang:
A central-limit-theorem version of the periodic Little's law. Queueing Syst. Theory Appl. 91(1-2): 15-47 (2019) - [j184]Karl Sigman, Ward Whitt:
Marked point processes in discrete time. Queueing Syst. Theory Appl. 92(1-2): 47-81 (2019) - 2018
- [j183]Ni Ma, Ward Whitt:
A Rare-Event Simulation Algorithm for Periodic Single-Server Queues. INFORMS J. Comput. 30(1): 71-89 (2018) - [j182]Song-Hee Kim, Ward Whitt, Won Chul Cha:
A Data-Driven Model of an Appointment-Generated Arrival Process at an Outpatient Clinic. INFORMS J. Comput. 30(1): 181-199 (2018) - [j181]Ward Whitt, Wei You:
Using Robust Queueing to Expose the Impact of Dependence in Single-Server Queues. Oper. Res. 66(1): 184-199 (2018) - [j180]Xu Sun, Ward Whitt:
Creating Work Breaks from Available Idleness. Manuf. Serv. Oper. Manag. 20(4): 721-736 (2018) - [j179]Ward Whitt:
A broad view of queueing theory through one issue. Queueing Syst. Theory Appl. 89(1-2): 3-14 (2018) - 2017
- [j178]Yunan Liu, Ward Whitt:
Stabilizing performance in a service system with time-varying arrivals and customer feedback. Eur. J. Oper. Res. 256(2): 473-486 (2017) - 2016
- [j177]Ward Whitt:
A Poisson limit for the departure process from a queue with many busy servers. Oper. Res. Lett. 44(5): 602-606 (2016) - [j176]Ward Whitt:
Heavy-traffic limits for a single-server queue leading up to a critical point. Oper. Res. Lett. 44(6): 796-800 (2016) - [j175]Ward Whitt:
Heavy-traffic fluid limits for periodic infinite-server queues. Queueing Syst. Theory Appl. 84(1-2): 111-143 (2016) - 2015
- [j174]Ohad Perry, Ward Whitt:
Achieving Rapid Recovery in an Overload Control for Large-Scale Service Systems. INFORMS J. Comput. 27(3): 491-506 (2015) - [j173]Song-Hee Kim, Ponni Vel, Ward Whitt, Won Chul Cha:
Poisson and non-Poisson properties in appointment-generated arrival processes: The case of an endocrinology clinic. Oper. Res. Lett. 43(3): 247-253 (2015) - [j172]James Dong, Ward Whitt:
Stochastic grey-box modeling of queueing systems: fitting birth-and-death processes to data. Queueing Syst. Theory Appl. 79(3-4): 391-426 (2015) - [j171]Ward Whitt:
Stabilizing performance in a single-server queue with time-varying arrival rate. Queueing Syst. Theory Appl. 81(4): 341-378 (2015) - [j170]Song-Hee Kim, Ward Whitt:
The Power of Alternative Kolmogorov-Smirnov Tests Based on Transformations of the Data. ACM Trans. Model. Comput. Simul. 25(4): 24:1-24:22 (2015) - [c11]Ni Ma, Ward Whitt:
Using simulation to study service-rate controls to stabilize performance in a single-server queue with time-varying arrival rate. WSC 2015: 2598-2609 - 2014
- [j169]Yunan Liu, Ward Whitt:
Algorithms for Time-Varying Networks of Many-Server Fluid Queues. INFORMS J. Comput. 26(1): 59-73 (2014) - [j168]Song-Hee Kim, Ward Whitt:
Are Call Center and Hospital Arrivals Well Modeled by Nonhomogeneous Poisson Processes? Manuf. Serv. Oper. Manag. 16(3): 464-480 (2014) - [j167]Ward Whitt:
The steady-state distribution of the Mt/m/∞ queue with a sinusoidal arrival rate function. Oper. Res. Lett. 42(5): 311-318 (2014) - [j166]Ward Whitt:
Heavy-traffic limits for queues with periodic arrival processes. Oper. Res. Lett. 42(6-7): 458-461 (2014) - [j165]Andrew A. Li, Ward Whitt:
Approximate blocking probabilities in loss models with independence and distribution assumptions relaxed. Perform. Evaluation 80: 82-101 (2014) - [j164]Ohad Perry, Ward Whitt:
Diffusion approximation for an overloaded X model via a stochastic averaging principle. Queueing Syst. Theory Appl. 76(4): 347-401 (2014) - 2013
- [j163]Kun Soo Park, Ward Whitt:
Continuous-time Markov chain models to estimate the premium for extended hedge fund lockups. Ann. Oper. Res. 211(1): 357-379 (2013) - [j162]Song-Hee Kim, Ward Whitt:
Statistical Analysis with Little's Law. Oper. Res. 61(4): 1030-1045 (2013) - [j161]Ohad Perry, Ward Whitt:
A Fluid Limit for an Overloaded X Model via a Stochastic Averaging Principle. Math. Oper. Res. 38(2): 294-349 (2013) - [j160]Ward Whitt:
OM Forum - Offered Load Analysis for Staffing. Manuf. Serv. Oper. Manag. 15(2): 166-169 (2013) - [j159]Guodong Pang, Ward Whitt:
Two-parameter heavy-traffic limits for infinite-server queues with dependent service times. Queueing Syst. Theory Appl. 73(2): 119-146 (2013) - [c10]Song-Hee Kim, Ward Whitt:
Using simulation to study statistical tests for arrival process and service time models for service systems. WSC 2013: 1223-1232 - 2012
- [j158]Yunan Liu, Ward Whitt:
Stabilizing Customer Abandonment in Many-Server Queues with Time-Varying Arrivals. Oper. Res. 60(6): 1551-1564 (2012) - [j157]Guodong Pang, Ward Whitt:
The Impact of Dependent Service Times on Large-Scale Service Systems. Manuf. Serv. Oper. Manag. 14(2): 262-278 (2012) - [j156]Ward Whitt:
Extending the FCLT version of L=λW. Oper. Res. Lett. 40(4): 230-234 (2012) - [j155]Yunan Liu, Ward Whitt:
A many-server fluid limit for the Gt/G//st+G/ queueing model experiencing periods of overloading. Oper. Res. Lett. 40(5): 307-312 (2012) - [j154]Yunan Liu, Ward Whitt:
The G t /GI/s t +GI many-server fluid queue. Queueing Syst. Theory Appl. 71(4): 405-444 (2012) - [j153]Yunan Liu, Ward Whitt:
A fluid model for many-server queues with time-varying arrivals and phase-type service distribution. SIGMETRICS Perform. Evaluation Rev. 39(4): 43 (2012) - 2011
- [j152]Yunan Liu, Ward Whitt:
A Network of Time-Varying Many-Server Fluid Queues with Customer Abandonment. Oper. Res. 59(4): 835-846 (2011) - [j151]Rouba Ibrahim, Ward Whitt:
Wait-Time Predictors for Customer Service Systems with Time-Varying Demand and Capacity. Oper. Res. 59(5): 1106-1118 (2011) - [j150]Ohad Perry, Ward Whitt:
A Fluid Approximation for Service Systems Responding to Unexpected Overloads. Oper. Res. 59(5): 1159-1170 (2011) - [j149]Yunan Liu, Ward Whitt:
Large-time asymptotics for the Gt/Mt/st+GIt many-server fluid queue with abandonment. Queueing Syst. Theory Appl. 67(2): 145-182 (2011) - [j148]Karl Sigman, Ward Whitt:
Heavy-traffic limits for nearly deterministic queues: stationary distributions. Queueing Syst. Theory Appl. 69(2): 145-173 (2011) - 2010
- [j147]Itay Gurvich, Ward Whitt:
Service-Level Differentiation in Many-Server Service Systems via Queue-Ratio Routing. Oper. Res. 58(2): 316-328 (2010) - [j146]Guodong Pang, Ward Whitt:
Two-parameter heavy-traffic limits for infinite-server queues. Queueing Syst. Theory Appl. 65(4): 325-364 (2010) - [j145]Karl Sigman, Ward Whitt:
Heavy-traffic limits for nearly deterministic queues. SIGMETRICS Perform. Evaluation Rev. 38(2): 15-17 (2010) - [j144]Yunan Liu, Ward Whitt:
A fluid approximation for large-scale service systems. SIGMETRICS Perform. Evaluation Rev. 38(2): 27-29 (2010) - [c9]Rouba Ibrahim, Ward Whitt:
Delay predictors for customer service systems with time-varying parameters. WSC 2010: 2375-2386 - [i2]Ohad Perry, Ward Whitt:
A Fluid Limit for an Overloaded X Model Via an Averaging Principle. CoRR abs/1006.5691 (2010) - [i1]Ohad Perry, Ward Whitt:
An ODE for an Overloaded X Model Involving a Stochastic Averaging Principle. CoRR abs/1008.1289 (2010)
2000 – 2009
- 2009
- [j143]Mor Armony, Nahum Shimkin, Ward Whitt:
The Impact of Delay Announcements in Many-Server Queues with Abandonment. Oper. Res. 57(1): 66-81 (2009) - [j142]Ohad Perry, Ward Whitt:
Responding to Unexpected Overloads in Large-Scale Service Systems. Manag. Sci. 55(8): 1353-1367 (2009) - [j141]Guodong Pang, Ward Whitt:
Service Interruptions in Large-Scale Service Systems. Manag. Sci. 55(9): 1499-1512 (2009) - [j140]Rouba Ibrahim, Ward Whitt:
Real-Time Delay Estimation in Overloaded Multiserver Queues with Abandonments. Manag. Sci. 55(10): 1729-1742 (2009) - [j139]Itay Gurvich, Ward Whitt:
Queue-and-Idleness-Ratio Controls in Many-Server Service Systems. Math. Oper. Res. 34(2): 363-396 (2009) - [j138]Itay Gurvich, Ward Whitt:
Scheduling Flexible Servers with Convex Delay Costs in Many-Server Service Systems. Manuf. Serv. Oper. Manag. 11(2): 237-253 (2009) - [j137]Rouba Ibrahim, Ward Whitt:
Real-Time Delay Estimation Based on Delay History. Manuf. Serv. Oper. Manag. 11(3): 397-415 (2009) - [j136]Guodong Pang, Ward Whitt:
Heavy-traffic limits for many-server queues with service interruptions. Queueing Syst. Theory Appl. 61(2-3): 167-202 (2009) - [j135]Guodong Pang, Ward Whitt:
Heavy-traffic extreme value limits for Erlang delay models. Queueing Syst. Theory Appl. 63(1-4): 13-32 (2009) - 2008
- [j134]Zohar Feldman, Avishai Mandelbaum, William A. Massey, Ward Whitt:
Staffing of Time-Varying Queues to Achieve Time-Stable Performance. Manag. Sci. 54(2): 324-338 (2008) - [j133]Rishi Talreja, Ward Whitt:
Fluid Models for Overloaded Multiclass Many-Server Queueing Systems with First-Come, First-Served Routing. Manag. Sci. 54(8): 1513-1527 (2008) - [j132]David Alan Goldberg, Ward Whitt:
The last departure time from an Mt/G/infinity queue with a terminating arrival process. Queueing Syst. Theory Appl. 58(2): 77-104 (2008) - [c8]Rouba Ibrahim, Ward Whitt:
REal-time delay estimation in call centers. WSC 2008: 2876-2883 - 2007
- [j131]Efstathios Avdis, Ward Whitt:
Power Algorithms for Inverting Laplace Transforms. INFORMS J. Comput. 19(3): 341-355 (2007) - [j130]Charles S. Crow IV, David Alan Goldberg, Ward Whitt:
Two-Moment Approximations for Maxima. Oper. Res. 55(3): 532-548 (2007) - [j129]Varun Gupta, Mor Harchol-Balter, Karl Sigman, Ward Whitt:
Analysis of join-the-shortest-queue routing for web server farms. Perform. Evaluation 64(9-12): 1062-1081 (2007) - [j128]Varun Gupta, Karl Sigman, Mor Harchol-Balter, Ward Whitt:
Insensitivity for PS server farms with JSQ routing. SIGMETRICS Perform. Evaluation Rev. 35(2): 24-26 (2007) - [j127]Wanmo Kang, Perwez Shahabuddin, Ward Whitt:
Exploiting regenerative structure to estimate finite time averages via simulation. ACM Trans. Model. Comput. Simul. 17(2): 8 (2007) - 2006
- [j126]Joseph Abate, Ward Whitt:
A Unified Framework for Numerically Inverting Laplace Transforms. INFORMS J. Comput. 18(4): 408-421 (2006) - [j125]Ward Whitt:
Fluid Models for Multiserver Queues with Abandonments. Oper. Res. 54(1): 37-54 (2006) - [j124]Ward Whitt:
Sensitivity of Performance in the Erlang-A Queueing Model to Changes in the Model Parameters. Oper. Res. 54(2): 247-260 (2006) - [j123]Ward Whitt:
The Impact of Increased Employee Retention on Performance in a Customer Contact Center. Manuf. Serv. Oper. Manag. 8(3): 235-252 (2006) - [p1]Ward Whitt:
Chapter 13 Analysis for Design. Simulation 2006: 381-413 - 2005
- [j122]Ward Whitt:
Engineering Solution of a Basic Call-Center Model. Manag. Sci. 51(2): 221-235 (2005) - [j121]Ward Whitt:
Heavy-Traffic Limits for the G/H2*/n/mQueue. Math. Oper. Res. 30(1): 1-27 (2005) - [j120]Rodney B. Wallace, Ward Whitt:
A Staffing Algorithm for Call Centers with Skill-Based Routing. Manuf. Serv. Oper. Manag. 7(4): 276-294 (2005) - [j119]Ward Whitt:
Two fluid approximations for multi-server queues with abandonments. Oper. Res. Lett. 33(4): 363-372 (2005) - 2004
- [j118]Ward Whitt:
A Diffusion Approximation for the G/GI/n/m Queue. Oper. Res. 52(6): 922-941 (2004) - [j117]Ward Whitt:
Efficiency-Driven Heavy-Traffic Approximations for Many-Server Queues with Abandonments. Manag. Sci. 50(10): 1449-1461 (2004) - [j116]Ward Whitt:
Heavy-Traffic Limits for Loss Proportions in Single-Server Queues. Queueing Syst. Theory Appl. 46(3-4): 507-536 (2004) - 2003
- [j115]Ward Whitt:
How Multiserver Queues Scale with Growing Congestion-Dependent Demand. Oper. Res. 51(4): 531-542 (2003) - 2002
- [j114]Clement McCalla, Ward Whitt:
A Time-Dependent Queueing-Network Model to Describe the Life-Cycle Dynamics of Private-Line Telecommunication Services. Telecommun. Syst. 19(1): 9-38 (2002) - 2001
- [j113]Ward Whitt:
The Reflection Map with Discontinuities. Math. Oper. Res. 26(3): 447-484 (2001) - [j112]Rayadurgam Srikant, Ward Whitt:
Resource Sharing for Book-Ahead and Instantaneous-Request Calls Using a CLT Approximation. Telecommun. Syst. 16(3-4): 233-253 (2001) - [j111]Nick G. Duffield, William A. Massey, Ward Whitt:
A Nonstationary Offered-Load Model for Packet Networks. Telecommun. Syst. 16(3-4): 271-296 (2001) - 2000
- [j110]Arthur W. Berger, Ward Whitt:
Workload bounds in fluid models with priorities. Perform. Evaluation 41(4): 249-267 (2000) - [j109]Ward Whitt:
An overview of Brownian and non-Brownian FCLTs for the single-server queue. Queueing Syst. Theory Appl. 36(1-3): 39-70 (2000) - [j108]Ward Whitt:
The impact of a heavy-tailed service-time distribution upon the M/GI/s waiting-time distribution. Queueing Syst. Theory Appl. 36(1-3): 71-87 (2000)
1990 – 1999
- 1999
- [j107]Joseph Abate, Ward Whitt:
Computing Laplace Transforms for Numerical Inversion Via Continued Fractions. INFORMS J. Comput. 11(4): 394-405 (1999) - [j106]Rayadurgam Srikant, Ward Whitt:
Variance Reduction in Simulations of Loss Models. Oper. Res. 47(4): 509-523 (1999) - [j105]Ward Whitt:
Using different response-time requirements to smooth time-varying demand for service. Oper. Res. Lett. 24(1-2): 1-10 (1999) - [j104]Ward Whitt:
Decomposition approximations for time-dependent Markovian queueing networks. Oper. Res. Lett. 24(3): 97-103 (1999) - [j103]Ward Whitt:
Dynamic staffing in a telephone call center aiming to immediately answer all calls. Oper. Res. Lett. 24(5): 205-212 (1999) - [j102]Joseph Abate, Ward Whitt:
Explicit M/G/1 waiting-time distributions for a class of long-tail service-time distributions. Oper. Res. Lett. 25(1): 25-31 (1999) - [j101]Albert G. Greenberg, R. Srikant, Ward Whitt:
Resource sharing for book-ahead and instantaneous-request calls. IEEE/ACM Trans. Netw. 7(1): 10-22 (1999) - 1998
- [j100]Arthur W. Berger, Ward Whitt:
Extending the effective bandwidth concept to networks with priority classes. IEEE Commun. Mag. 36(8): 78-83 (1998) - [j99]Joseph Abate, Gagan L. Choudhury, Ward Whitt:
Numerical Inversion of Multidimensional Laplace Transforms by the Laguerre Method. Perform. Evaluation 31(3-4): 229-243 (1998) - [j98]Anja Feldmann, Ward Whitt:
Fitting Mixtures of Exponentials to Long-Tail Distributions to Analyze Network. Perform. Evaluation 31(3-4): 245-279 (1998) - [j97]Gísli Hjálmtýsson, Ward Whitt:
Periodic load balancing. Queueing Syst. Theory Appl. 30(1-2): 203-250 (1998) - [j96]Arthur W. Berger, Ward Whitt:
Effective bandwidths with priorities. IEEE/ACM Trans. Netw. 6(4): 447-460 (1998) - 1997
- [j95]Gagan L. Choudhury, Ward Whitt:
Probabilistic Scaling for the Numerical Inversion of Nonprobability Transforms. INFORMS J. Comput. 9(2): 175-184 (1997) - [j94]Gagan L. Choudhury, David M. Lucantoni, Ward Whitt:
Numerical Solution of Piecewise-Stationary Mt/Gt/1 Queues. Oper. Res. 45(3): 451-463 (1997) - [j93]Joseph Abate, Ward Whitt:
Limits and approximations for the M/G/1 LIFO waiting-time distribution. Oper. Res. Lett. 20(5): 199-206 (1997) - [j92]