This paper presents a periodic review capacitated lot sizing model with limited backlogging and a possibility of emergency orders. The main intention of placing emergency orders is to satisfy the demand as soon as a shortage occurs. It is assumed that the demands are independently distributed in successive periods. There are two resupply modes available: a regular mode and an emergency mode. He...

ABSTRACT: We consider a periodic review inventory system for perishable items with lost sales. Demands arrive according to a Poisson process. The lifetime of each item is exponentially distributed and the procurement lead time is constant. This type of modeling is motivated by the recent application of the so called Time Temperature Technologies. With this technology, it is possible to detect a...

We introduce a single location periodic review inventory control problem with lost sales and fractional lead times. We model the optimal inventory control problem as a stochastic dynamic program and analyze properties of the objective function as well as the optimal policy. We present upper and lower bounds on the optimal policy. These bounds can readily be used in easily computable heuristics....

ABSTRACT
 PT. XYZ is a service company engaged in the maintenance of port heavy equipment and modification as well procurement spare parts for equipment. In 2018 along with improving work performance expands its wings to civil works sector, starting from dock repair work, accessories, construction structures reclamation. provision equipment, company's inventory must be guaranteed. at each ...

In an e-retailing setting, the efficient utilization of inventory, storage space, and labor is paramount to achieving high levels of customer service and company profits. To optimize the storage space and labor, a retailer will split the warehouse into two storage regions with different densities. One region is for picking customer orders and the other to hold reserve stock. As a consequence, t...

By Francis A. Roesch and Gregorv A. Reams Y I The USDA Forest Service Southern Research Station (SRS) Forest Inventory and Analysis Unit (FIA) has initiated an annualized forest inventory sampling des@, the Southern Annual Forest Inventory System (SAFIS). SAFIS was introduced to improve estimation of both the current resource inventory and changes in the resource. Under the previous periodic in...

Component commonality has been widely recognized as a key factor in achieving product variety at low cost. Yet, the theory on the value of component commonality is rather limited in the inventory literature. The existing results were built primarily on single-period models or periodic-review models with zero lead times. In this paper, we consider a continuous-review system with positive lead ti...

In this paper, we prove the applicability of the strong stability method to inventory models. Real life inventory problems are often very complicated and they are resolved only through approximations. Therefore, it is very important to justify these approximations and to estimate the resultant error. We study the strong stability in a periodic review inventory model with an (R, s, S) policy. Af...

We consider a single-location inventory system with periodic review and stochastic demand. It places replenishment orders to raise the inventory position—that is, inventory on hand plus inventory in transit—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 do not cross. Demand tha...