We study the static assignment to M parallel, exponential, heterogeneous servers. Blocked customers are lost, while the objective is to minimize the average number of blocked customers. The problem is formulated as a stochastic control problem with partial observation, and an equivalent full observation problem is formulated. Numerical experiments are conducted and the structure of the optimal ...

In this paper we consider a limited capacity Markovian queueing system with two heterogeneous servers subjected to varying catastrophic intensity. The transient solution of the model has been obtained and various measures of performance have been computed numerically with the help of simulation technique. The steady state solution of the system has also been provided.

This paper considers a parallel queueing model with heterogeneous servers, where an arriving customer joins the shortest queue and jockeying between queues is permitted. Based on the matrix analytic approach pioneered by Neuts, we obtain the tail decay rate of the stationary distribution for this queueing model.

Lin & Kumar [2] introduced a control model with a single queue and two heterogeneous servers. They showed, using policy iteration, that the slower server should only be used if the queue length is above a certain level, i.e., the optimal policy is of threshold type. In this note we give a simple iterative proof of this result. AMS Subject Classification (1991): 90B22, 90C40

This paper describes a technique for information mediation when multiple heterogeneous knowledge and data servers are to be accessed during query processing. One problem is building an intelligent interface between each knowledge server (KS) and its processor (KP); and the second is to provide interoper-ability among multiple KP/KS so that a query may be answered using information from multiple...

This paper describes a technique for information mediation when multiple heterogeneous knowledge and data servers are to be accessed during query processing. One problem is building an intelligent interface between each knowledge server (KS) and its processor (KP); and the second is to provide interoper-ability among multiple KP/KS so that a query may be answered using information from multiple...