We consider a system with two heterogeneous traffic classes, one having light-tailed characteristics, the other one exhibiting heavy-tailed properties. When both classes are backlogged, the two corresponding queues are each served at a certain nominal rate. However, when one queue empties, the service rate for the other class increases. This dynamic sharing of surplus service capacity is remini...

The objective of recent research in fair queueing schemes has been to efficiently emulate a fluid-flow generalized (weighted) processor sharing (GPS) system, as closely as possible. A primary motivation for the use of fair-queueing has been its use as a means of providing bandwidth guarantees and as a consequence end-to-end delay bounds for traffic with bounded burstiness. The rate guarantees t...

We consider a single-stage inventory system supplying external demands and receiving stocks from an ample supply. Time is divided into periods of …xed length; a period can be a day or a week depending on the situation. In each period, demands arrive and are either …lled or backlogged. The system operates under a general periodic-review base-stock policy. Under this policy, the inventory positio...

In recent times, in the literature of inventory management there exists a notorious interest production-inventory models focused on imperfect production processes with deterministic time horizon. Nevertheless, it is well-known that high influence and impact caused by learning effect random planning This research work formulates mathematical model for re-workable multi-item system, which demand ...

in this paper, a production inventory model is developed for the business enterprise which consists of three wings. the first wing is for manufacturing new items, the second wing is for collecting the returned items, while third wing is for remanufacturing the returned item. in this model we consider the fact that the storage item is deteriorated during storage periods and salvage value is inco...

In this paper, we formulate and solve an economic order quantity model with default risk. Our main purpose is to investigate retailer’s optimal replenishment time credit period for deteriorating items under selling price-dependent demand while maximizing profit per unit time. Here, shortages are allowed partially backlogged interested customers. We show that not only exist but they also unique....

This article examines a two-commodity continuous review perishable inventory system. The demands are arrived at for each product by independent Markovian arrival processes (MAP). Lifetimes follow an exponential distribution. commodities assumed to be substitutable. If both have reached zero, demand is backlogged up predetermined levels. article’s novelty has been local purchase, which made clea...

In this paper, we address an inventory system where the demand rate multiplicatively combines effects of time and selling price. It is assumed that product two power functions, one depending on price other elapsed since last replenishment. Shortages are allowed fully backlogged. The aim to obtain lot sizing, cycle unit maximize profit per time. To achieve this, efficient algorithms proposed opt...