This paper extends the theory of real options, which mainly considers the problem of timing of investment, by letting the firm choose also the quantity produced after the time of investment. Under the conditions of irreversible investment and uncertainty in future demand, the firm can adjust its output quantity at each point in time in the future. Our paper shows that changing the structure of ...

In this paper, a discount model is proposed to coordinate pricing and ordering decisions in a two-echelon supply chain (SC). Demand is stochastic and price sensitive while lead times are fixed. Decentralized decision making where downstream decides on selling price and order size is investigated. Then, joint pricing and ordering decisions are extracted where both members act as a single entity ...

The dependence of lithium abundance on modified gravity in low-mass stellar objects is demonstrated. This may introduce an additional uncertainty to age determination techniques young stars and globular clusters if they rely the light element depletion method.

generally ordering policies are done by two methods, including fix order quantity (foq) and fix order period (fop). these methods are static and either the quantity of ordering or the procedure of ordering is fixing in throughout time horizon. in real environments, demand is varying in any period and may be considered as uncertainty. when demand is variable in any period, the traditional and st...

In order to investigate supply chain coordination and decision under customer balking stochastic demand, the article considers a two-echelon consisting of one manufacturer with risk-neutral retailer develops two models in centralized decentralized system three contracts are designed coordinate optimal price strategies obtained. The results show that revenue cost-sharing contract can price-depen...

Seasonal items like fruits, fish, winter cosmetics, fashion apparel, etc. generally exhibits different demand patterns at various times during the season. Production and inventory planning must reflect this property for cost effectiveness and optimization of resources. This paper presents two production-inventory models for perishable seasonal products that minimize total inventory costs. The m...

In the fundamental production inventory model, in order to solve the economic production quantity (EPQ) we always fix both the demand quantity and the production quantity per day. But, in the real situation, both of them probably will have little disturbances every day. Therefore, we should fuzzify both of them to solve the economic production quantity (q*) per cycle. Using α-cut for defuzzific...

In this article, a finite horizon, multi product and multi period economic order quantity like seasonal items is considered where demand rate is deterministic and known but variable in each period. The order quantities of items come in batch sizes and the end of the period order quantity and, consequently, demand of customers are zero. In addition, storage space is constrained and the problem...

We estimate the slope of the demand curve for newly auctioned FHLB discount notes and investigate the impacts of arbitrage risk and heterogeneity of investor beliefs on demand elasticity. Our unique dataset of roughly 2,900 observations of two price-quantity pairs—the first from a pre-auction dealer survey, the second from actual auction results—provides the quantity shift necessary to identify...

This paper considers the ranking of alternative replenishment policies for a single-location inventory when customer demand is con"ned to a single product. It is supposed that customer demand is uncertain and described by imprecise linguistic terms de"ned by fuzzy sets. For example, `demand is about da, or `demand is more or less between d and d a, or more complex `demand is about d, but there ...