in this paper, we develop an inventory model with delay in payments for deteriorating items. in our model, retailer who purchases the items enjoys a fixed credit period offered by his/her supplier and, in turn, also offers a credit period to his/her customers in order to promote the market competition. the demand is assumed to be linear function of the retailer's current-stock level. the effect...

Supply disruption is a common phenomenon in business activities. For the case where supply predictable, retailer should make an emergency procurement beforehand to decrease inventory cost. scenario such that happening time of obeys certain probability distribution but ending deterministic, based on minimizing cost and under two possible strategies, we establish optimization model. By considerin...

There is a longstanding debate about how to appropriately model the combinability of affixes, especially English suffixes. One widely accepted principle is the notion of so-called selectional restrictions, i.e. grammatical requirements of particular affixes. For example, the suffix -ness can only combine with adjectival bases. Hay (2002) proposed a psycholinguistic approach to affix ordering no...

This paper proposes a joint inspection-based maintenance and spare ordering optimization policy that considers the problem of integrated inspection, preventive maintenance, ordering, quality control for four-state single-unit manufacturing system. When an inspection detects minor defect, second phase is initiated regular order placed. Product begins to deteriorate when system undergoes severe d...

We analyze an infinite horizon, single-product, periodic review model in which pricing and production/inventory decisions are made simultaneously. Demands in different periods are identically distributed random variables that are independent of each other, and their distributions depend on the product price. Pricing and ordering decisions are made at the beginning of each period, and all shorta...

Expected inventory order crossovers occur if at the moment of ordering it is expected that orders will not arrive in the sequence they are ordered. Recent research has shown that (a) expected inventory order crossovers will be encountered more frequently in future, and that (b) use of a myopic order-up-to policy based on a stochastic dynamic programming approach leads to improved performance co...

We analyze an infinite horizon, single product, periodic review model in which pricing and production/inventory decisions are made simultaneously. Demands in different periods are identically distributed random variables that are independent of each other and their distributions depend on the product price. Pricing and ordering decisions are made at the beginning of each period and all shortage...

The risk of supply disruptions due to suppliers’ financial problems plays a prominent role in manufacturers’ risk portfolios. Even large suppliers (e.g. Delphi) could file for bankruptcy, and manufacturer’s actions, such as financial subsidies to the suppliers, affect profoundly suppliers’ financial health. Using a dynamic, stochastic, periodic-review model of the manufacturer’s joint capacity ...