A two-warehouse inventory model with deteriorating items and rework process time varying demand rate is presented. The Last-In-First-Out (LIFO) First-In-First-Out (FIFO) policies are considered the assumption that holding cost higher in rented warehouse (RW) compared to owned (OW). aim of proposed determine optimum values a production cycle will minimise total relevant cost, TRC*. We have utili...

in this study, 3 models of time-varying parameters (tvp), dynamic model selection (dms) and dynamic model averaging (dma) and a comparison with the ordinary least squares (ols) method in matlab in the time period 2003-2013 (with data on a monthly basis) are discussed. in the present study, the variables of unofficial exchange rate changes, interest rate changes and inflation in oil price foreca...

We consider a queueing network with several customer classes and several service pools, each consisting of many statistically identical servers. The service requirement of each customer is assumed to be generally distributed and is allowed to depend on both the customer class and the service pool. Customers may also abandon while waiting in queue, with exponentially distributed patience time. F...

We study the optimal dynamic scheduling of different requests of service in a multiclass stochastic fluid model that is motivated by recent and emerging computing paradigms for Internet services and applications. In particular, our focus is on environments with specific performance guarantees for each class under a profit model in which revenues are gained when performance guarantees are satisf...

In this paper we consider an imperfect production system which produces good and defective items and assume that defective items can be reworked. Due to the nature of rework process we do not restrict the rework rate to be equal to normal production rate or constant and assume that it is a random variable with an arbitrary distribution function. We also assume as it is true in most real world s...

This paper continues to study the problem of optimally admitting a finite number customers from an auxiliary buffer with a low holding cost into a single–server queue with a high holding cost without observing the status of the single-server queue, which was introduced in Part I. This paper first proves a few asymptotic properties of the sequence of optimal schedules indexed by the number of cu...

Inventory model under risk that demand is uncertain is recognized. In this paper, the fuzzy demand per day and fuzzy lead time on a cycle in fuzzy inventory control system are assumed to trapezoidal distribution, trapezoidal fuzzy number by decision maker. A fuzzy inventory model under manager’s preference for order quantity is presented first. This model is given by fuzzy total annual inventor...

This paper discusses the reliable guaranteed cost control problem of networked control systems with timevarying sampling period and actuator failures for a given quadratic cost function. For linear time-invariant controlled plant, we assume that the time delay is constant and shorter than the sampling period, the sampling is time-varying within a certain known bound, the system is transformed i...