Learn More
We study the problem of stable scheduling for a class of wireless networks. The goal is to stabilize the queues holding information to be transmitted over a fading channel. Few assumptions are made on the arrival process statistics other than the assumption that their mean values lie within the capacity region and that they satisfy a version of the law of(More)
— We consider wireless networks with interference constraints. The network consists of a set of links and a set of users who generate packets that traverse these links. Each user is associated with a route consisting of a sequence of links. The links are subject to the usual interference constraints: (i) if link l interferes with link k, then link k also(More)
We consider a manufacturing system producing several part{types on several machines. Raw parts are input to the system. Each unit of a given part{type requires a predetermined processing time at each of several machines, in a given order. A setup time is required whenever a machine switches from processing one part{type to another. For a single machine(More)
Quadratic approximations to the diierential cost-to-go function, which yield linear switching curves, have been extensively studied in the literature. In this paper, we provide solutions to the partial diierential equations associated with the components of the steady-state probability density function of the buuer levels for two part-type, single machine(More)
We consider multiple part-type, single machine manufacturing systems subject to failures. We provide necessary conditions and suucient conditions for the optimality of Just-In-Time (JIT) manufacturing, and further show that the necessary and suucient conditions coincide when the negative buuer costs for all the parts are equal. In general, nding optimal(More)
We consider a failure-prone manufacturing system with bursty demand arrivals. We prove that the hedging-point policy is optimal for this problem and provide analytical expressions to compute the hedging point. This allows us to compare our exact results to approximations provided by diiusion limits and large deviations. We also show that our result leads to(More)
—This paper considers problems motivated by the dynamic allocation of limited heterogeneous resources in new product development (NPD) projects. The interchangeability of resources and simultaneous resource sharing are defining characteristics of NPD processes. A continuous flow model is introduced that incorporates these features. For problems without(More)