Ward Whitt

85 catalog papers. Identity-linked publications and additional name matches are distinguished below.

ORCID: 0000-0003-4298-9964

Columbia University

Publications

Time-Varying Robust Queueing — Operations Research 2019
Periodic Little’s Law — Operations Research 2019
Creating Work Breaks from Available Idleness — Manufacturing & Service Operations Management 2018
A Rare-Event Simulation Algorithm for Periodic Single-Server Queues — INFORMS Journal on Computing 2018
A Data-Driven Model of an Appointment-Generated Arrival Process at an Outpatient Clinic — INFORMS Journal on Computing 2018
Using Robust Queueing to Expose the Impact of Dependence in Single-Server Queues — Operations Research 2018
Achieving Rapid Recovery in an Overload Control for Large-Scale Service Systems — INFORMS Journal on Computing 2015
The Maximum Throughput on a Golf Course — Production and Operations Management 2015
Algorithms for Time-Varying Networks of Many-Server Fluid Queues — INFORMS Journal on Computing 2014
Are Call Center and Hospital Arrivals Well Modeled by Nonhomogeneous Poisson Processes? — Manufacturing & Service Operations Management 2014
OM Forum—Offered Load Analysis for Staffing — Manufacturing & Service Operations Management 2013
Statistical Analysis with Little's Law — Operations Research 2013
Stabilizing Customer Abandonment in Many-Server Queues with Time-Varying Arrivals — Operations Research 2012
The Impact of Dependent Service Times on Large-Scale Service Systems — Manufacturing & Service Operations Management 2012
A Fluid Approximation for Service Systems Responding to Unexpected Overloads — Operations Research 2011
Real-Time Delay Estimation Based on Delay History in Many-Server Service Systems with Time-Varying Arrivals — Production and Operations Management 2011
Wait-Time Predictors for Customer Service Systems with Time-Varying Demand and Capacity — Operations Research 2011
Service-Level Differentiation in Many-Server Service Systems via Queue-Ratio Routing — Operations Research 2010
Scheduling Flexible Servers with Convex Delay Costs in Many-Server Service Systems — Manufacturing & Service Operations Management 2009
Real-Time Delay Estimation Based on Delay History — Manufacturing & Service Operations Management 2009
Real-Time Delay Estimation in Overloaded Multiserver Queues with Abandonments — Management Science 2009
Service Interruptions in Large-Scale Service Systems — Management Science 2009
Responding to Unexpected Overloads in Large-Scale Service Systems — Management Science 2009
The Impact of Delay Announcements in Many-Server Queues with Abandonment — Operations Research 2009
Fluid Models for Overloaded Multiclass Many-Server Queueing Systems with First-Come, First-Served Routing — Management Science 2008
Staffing of Time-Varying Queues to Achieve Time-Stable Performance — Management Science 2008
Two-Moment Approximations for Maxima — Operations Research 2007
Power Algorithms for Inverting Laplace Transforms — INFORMS Journal on Computing 2007
Value-Based Routing and Preference-Based Routing in Customer Contact Centers — Production and Operations Management 2007
Coping with Time-Varying Demand When Setting Staffing Requirements for a Service System — Production and Operations Management 2007
Sensitivity of Performance in the Erlang-A Queueing Model to Changes in the Model Parameters — Operations Research 2006
Staffing a Call Center with Uncertain Arrival Rate and Absenteeism — Production and Operations Management 2006
The Impact of Increased Employee Retention on Performance in a Customer Contact Center — Manufacturing & Service Operations Management 2006
A Unified Framework for Numerically Inverting Laplace Transforms — INFORMS Journal on Computing 2006
Fluid Models for Multiserver Queues with Abandonments — Operations Research 2006
A Staffing Algorithm for Call Centers with Skill-Based Routing — Manufacturing & Service Operations Management 2005
Engineering Solution of a Basic Call-Center Model — Management Science 2005
A Diffusion Approximation for the G/GI/n/m Queue — Operations Research 2004
Efficiency-Driven Heavy-Traffic Approximations for Many-Server Queues with Abandonments — Management Science 2004
How Multiserver Queues Scale with Growing Congestion-Dependent Demand — Operations Research 2003
Variance Reduction in Simulations of Loss Models — Operations Research 1999
Computing Laplace Transforms for Numerical Inversion Via Continued Fractions — INFORMS Journal on Computing 1999
Partitioning Customers into Service Groups — Management Science 1999
Improving Service by Informing Customers About Anticipated Delays — Management Science 1999
Predicting Queueing Delays — Management Science 1999
Numerical Solution of Piecewise-StationaryMt/Gt/1 Queues — Operations Research 1997
Probabilistic Scaling for the Numerical Inversion of Nonprobability Transforms — INFORMS Journal on Computing 1997
On the Laguerre Method for Numerically Inverting Laplace Transforms — INFORMS Journal on Computing 1996
Server Staffing to Meet Time-Varying Demand — Management Science 1996
Stationary-Process Approximations for the Nonstationary Erlang Loss Model — Operations Research 1996
Exponential Approximations for Tail Probabilities in Queues II: Sojourn Time and Workload — Operations Research 1996
Variability Functions for Parametric-Decomposition Approximations of Queueing Networks — Management Science 1995
Numerical Inversion of Laplace Transforms of Probability Distributions — ORSA Journal on Computing 1995
Exponential Approximations for Tail Probabilities in Queues, I: Waiting Times — Operations Research 1995
Sensitivity to the Service-Time Distribution in the Nonstationary Erlang Loss Model — Management Science 1995
Transient Behavior of the M/G/1 Workload Process — Operations Research 1994
The Physics of the Mt/G/∞ Queue — Operations Research 1993
APPROXIMATIONS FOR THE GI/G/m QUEUE — Production and Operations Management 1993
Estimating Customer and Time Averages — Operations Research 1993
Large Fluctuations in a Deterministic Multiclass Network of Queues — Management Science 1993
Mt/G/∞ Queues with Sinusoidal Arrival Rates — Management Science 1993
Understanding the Efficiency of Multi-Server Service Systems — Management Science 1992
Asymptotic Formulas for Markov Processes with Applications to Simulation — Operations Research 1992
The Asymptotic Efficiency of Simulation Estimators — Operations Research 1992
The Pointwise Stationary Approximation for Mt/Mt/s Queues Is Asymptotically Correct As the Rates Increase — Management Science 1991
The Efficiency of One Long Run Versus Independent Replications in Steady-State Simulation — Management Science 1991
On Arrivals That See Time Averages — Operations Research 1990
Arranging Queues in Series: A Simulation Experiment — Management Science 1990
Extensions of the Queueing RelationsL= λWandH= λG — Operations Research 1989
Indirect Estimation ViaL= λW — Operations Research 1989
Planning Queueing Simulations — Management Science 1989
An Interpolation Approximation for the Mean Workload in a GI/G/1 Queue — Operations Research 1989
Estimating Average Production Intervals Using Inventory Measurements: Little's Law for Partially Observable Processes — Operations Research 1988
A Light-Traffic Approximation for Single-Class Departure Processes from Multi-Class Queues — Management Science 1988
Deciding Which Queue to Join: Some Counterexamples — Operations Research 1986
The Best Order for Queues in Series — Management Science 1985
Minimizing Delays in theGI/G/1 Queue — Operations Research 1984
Approximating a Point Process by a Renewal Process, I: Two Basic Methods — Operations Research 1982
On Stochastic Bounds for the Delay Distribution in theGI/G/sQueue — Operations Research 1981
Heavy-Traffic Limits for Queues with Many Exponential Servers — Operations Research 1981
The Stationary Distribution of a Stochastic Clearing Process — Operations Research 1981
Approximating a Point Process by a Renewal Process: The View Through a Queue, an Indirect Approach — Management Science 1981
Comparing Probability Measures on a Set with an Intransitive Preference Relation — Management Science 1979
Bivariate Distributions with Given Marginals — The Annals of Statistics 1976
Letter to the Editor—A Guide to the Application of Limit Theorems for Sequences of Stochastic Processes — Operations Research 1970