Whitt Ward

Ward Whitt

Information about the author Ward Whitt will soon be added to the site.
Found 104 papers in total
Periodic load balancing
Periodic load balancing
1998
Multiprocessor load balancing aims to improve performance by moving jobs from highly...
Modeling service-time distributions with non-exponential tails: Beta mixtures of exponentials
Modeling service-time distributions with non-exponential tails: Beta mixtures of exponentials
1999
Motivated by interest in probability density functions (pdfs) with nonexponential...
Infinite-series representations of Laplace transforms of probability density functions for numerical inversion
Infinite-series representations of Laplace transforms of probability density functions for numerical inversion
1999
In order to numerically invert Laplace transforms to calculate probability density...
Calculating transient characteristics of the Erlang loss model by numerical transform inversion
Calculating transient characteristics of the Erlang loss model by numerical transform inversion
1998
We show how to compute the time-dependent blocking probability given an arbitrary...
Peak congestion in multi-server-service systems with slowly varying arrival rates
Peak congestion in multi-server-service systems with slowly varying arrival rates
1997
In this paper we consider the M t /G/∞ queueing model with infinitely many...
Asymptotics for M/G/1 low-priority waiting-time tail probabilities
Asymptotics for M/G/1 low-priority waiting-time tail probabilities
1997
We consider the classical M / G /1 queue with two priority classes and the...
Control and recovery from rare congestion events in a large multi-server system
Control and recovery from rare congestion events in a large multi-server system
1997
We develop deterministic fluid approximations to describe the recovery from rare...
Stochastic limit laws for schedule makespans
Stochastic limit laws for schedule makespans
1996
A basic multiprocessor version of the makespan scheduling problem requires that n...
Predicting queueing delays
Predicting queueing delays
1999
This paper investigates the possibility of predicting each customer's waiting time in...
Improving service by informing customers about anticipated delays
Improving service by informing customers about anticipated delays
1999
This paper investigates the effect upon performance in a service system, such as a...
Verifying cell loss requirements in high-speed communication networks
Verifying cell loss requirements in high-speed communication networks
1998
In high-speed communication networks it is common to have requirements of very small...
Probabilistic scaling for the numerical inversion of nonprobability transforms
Probabilistic scaling for the numerical inversion of nonprobability transforms
1997
It is known that probability density functions and probability mass functions usually...
On the Laguerre method for numerically inverting Laplace transforms
On the Laguerre method for numerically inverting Laplace transforms
1996
The Laguerre method for numerically inverting Laplace transforms is an old established...
Numerical inversion of Laplace transforms of probability distributions
Numerical inversion of Laplace transforms of probability distributions
1995
We present a simple algorithm for numerically inverting Laplace transforms. The...
Limits and approximations for the M/G/1 LIFO waiting-time distribution
Limits and approximations for the M/G/1 LIFO waiting-time distribution
1997
We provide additional descriptions of the steady-state waiting-time distribution in...
Exponential approximations for tail probabilities in queues, I: Waiting times
Exponential approximations for tail probabilities in queues, I: Waiting times
1995
This paper focuses on simple exponential approximations for tail probabilities of the...
Server staffing to meet time-varying demand
Server staffing to meet time-varying demand
1996
We consider a multiserver service system with general nonstationary arrivals and...
Portfolio choice and the Bayesian kelly criterion
Portfolio choice and the Bayesian kelly criterion
1996
The authors derive optimal gambling and investment policies for cases in which the...
On the Laguerre method for numerically inverting Laplace transforms
On the Laguerre method for numerically inverting Laplace transforms
1996
The Laguerre method for numerically inverting Laplace transforms is an old established...
A comparison of the sliding window and the leaky bucket
A comparison of the sliding window and the leaky bucket
1995
In this paper the authors compare the sliding-window (SW) and leaky-bucket (LB) input...
Stochastic limit laws for schedule makespans
Stochastic limit laws for schedule makespans
1996
A basic multiprocessor version of the makespan scheduling problem requires that n...
Heavy-traffic extreme-value limits for queues
Heavy-traffic extreme-value limits for queues
1995
The authors consider the maximum waiting time among the first n customers in the...
Calculating the M/G/1 busy-peiod density and LIFO waiting-time distribution by direct numerical transform inversion
Calculating the M/G/1 busy-peiod density and LIFO waiting-time distribution by direct numerical transform inversion
1995
It is well known that the M/G/1 busy-period density can be characterized by the...
Piecewise-linear diffusion processes
Piecewise-linear diffusion processes
1995
Diffusion processes are often regarded as among the more abstruse stochastic...
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