This paper addresses the single-item, non-stationary stochastic demand inventory control problem under the nonstationary (R,S) policy. In non-stationary (R,S) policies two sets of control parameters—the review intervals, which are not necessarily equal, and the order-up-to-levels for replenishment periods—are fixed at the beginning of the planning horizon to minimize the expected total cost. It...

We consider a system that faces stochastic demand, reviews the system periodically and places replenishment orders to raise the inventory position to exactly S at the beginning of every period. The lead time associated with each of these orders is random. However the lead time process is such that these orders are ful lled in a rst-in rst-out sequence. Demand that can not be met with inventory ...

Recently, in Mathematical and Computational Applications Journal Chiu et al. [1] and Chen and Chiu [2] propose an inventory model based on EPQ with rework to determine the replenishment lot size and the number of shipments for a vendor-buyer integrated production-inventory system. They solve the inventory problem by considering both variables as continuous. However, the number of shipments must...

This paper describes the use of a dynamical simulation model to evaluate various management policies in a two-stage production systems. Such a simulation-based evaluation is applied to the situation of GrandIlet (Reunion Island) where 51 pig farms must supply a collective treatment plant (CTP) with pig slurry. Based on actual data and stakeholders’ preferences, three policies are tested: a plan...

Dams and impoundments constructed in rivers produce changes their hydrological sediment transport regimes, regulate flows reduce the supply of sediments downstream. Artificially inducing floods from reservoirs conjunction with sediment-replenishment strategies is currently being employed to enhance river catchment areas. In this study, sediment-replenished artificial are compared non-sediment r...