In this paper, we construct and analyze inventory and investment in quality im­ provement policies under return on investment (ROI) maximization. In our model, the level of quality is represented by the fraction of an order quantity meeting the quality requirements such £is product specifications. The key contributions of this paper are the establishment of an ROI model and characterization of ...

In this paper, we attempt to develop an inventory model for deteriorating items with the consideration of the fact that the use of preservation technology (PT) can reduce the deterioration rate significantly. In this model the shortages are allowed and salvage value is incorporated to the deteriorated items. Demand rate is constant, deterioration rate is time dependent with Weibull’s distributi...

In this paper, we establish a new preservation property of quasi-K-concavity under certain optimization operations. One important application of the result is to analyze joint inventory-pricing models for single-product periodic-review inventory systems with concave ordering costs. At each period, an ordering quantity and a selling price of the product are determined simultaneously. Demand is r...

This paper establishes a new preservation property of supermodularity in a class of two-dimensional parametric optimization problems, where the constraint sets may not be lattices. This property and its extensions unify several results in the literature and provide powerful tools to analyze a variety of operations models including a two-product coordinated pricing and inventory control problem ...

the water and wastewater considered as one of capital intensive industrials in iran because it has 436 thousand milliard rial in fixed asset, 32.8 million rial in monopolistic market and the share of 0.05 % in gdp. the statistics showed that there is approximately 22 % of facilities and equipment in industrial production process as uncompleted projects. the need for macro investment, the limite...

<p style='text-indent:20px;'>In the business world, both supplier and retailer accept credit to make their position strong, because not only strengthens relationships but also increases scale of profits. In this paper, we consider an inventory model for non-instantaneous deteriorating items with price sensitive demand, time varying deterioration rate under two-level trade policy. Besides,...

a r t i c l e i n f o The Internet has provided great convenience for online shoppers and has presented unprecedented opportunities for online retailers to understand their customers. Getting the pricing right has emerged as one of the ultimate keys to the success of electronic commerce. Although some online retailers have tried some person-alized pricing strategies for perishable capacity or i...

This paper addresses a single item two-level supply chain inventory model considering deterioration during carrying of deteriorating from supplier’s warehouse to retailer’s as well in the warehouse. The assumes preservation technology prevent rate deterioration. An upper limit for investment has been set constraint model. maximizes profit per unit time, simultaneously calculated optimal order q...

This paper studies a one-shot inventory replenishment problem with dynamic pricing. The customer arrival rate is assumed to follow a geometric Brownian motion. Homogeneous customers have an isoelastic demand function and do not behave strategically. We find a closed-form optimal pricing policy, which utilizes current demand information. Under this pricing policy the inventory trajectory is dete...