After more than 20 years of extensive study, the policy of pooling lead-time risk by simultaneously splitting replenishment orders among several suppliers continues to attract the attention of researchers. A critical review of the extant literature is conducted. Important and persistent limitations of current research are revealed that may make the policy uneconomical, in general, and more prom...

In this paper, a simultaneous lead time quotation and lot sizing problem in an assembly system is investigated. We address a production system with a product that has deterministic demand over a T-period planning horizon and is produced in lots because of the economy of scale. If a lot is completed before the demand period, inventory carrying cost is incurred. On shortages, a lead time is quote...

Linear programming (LP) models for Supply Chain Operations Planning (SCOP) are widely used in Advanced Planning Systems. The solution to the LP model is a proposal for order releases to the various production units (PU) in the supply network. As we have to account for uncertainty at the shop floor, the relationship between work-in-progress (WIP) and lead time is non-linear which makes it diffic...

Supply chains are formed out of complex interactions amongst several enterprises whose aim is to produce and transport goods so that customer desired products are sold at various retail outlets. Computing the total average cycle time for customer orders entering such a complex network of systems is an important exercise. In this paper, we present analytical models for evaluating the average lea...

New product development is an important business process and constitutes a major contributor to the business excellence of any manufacturing firm. Designing an optimized new product development process is an important problem in itself and is of significant practical and research interest. Lead time is an important performance metric for a product development organization. In this paper, we dev...

As the lifecycle of a product gets shorter, the timely introduction of new products becomes an invaluable asset to most manufacturing firms. It is needless to say that the competitive edge is given to a firm with the better knowledge on how to estimate the product development (PD) process because reducing the product development time is a critical issue for manufacturing firms. However, it is d...

This paper introduces a mixture distribution approach to modeling the probability density function for lead time demand (LTD) in problems where a continuous review inventory system is implemented. The method differs from the typical “moment-matching” approach by focusing on building up an accurate, closed-form approximation to the LTD distribution from its components by using mixtures of trunca...

T his paper studies a decentralized supply chain consisting of a supplier and a retailer facing price-and lead-time-sensitive demands. A Stackelberg game is constructed to analyze the price and lead time decisions by the supplier as the leader and the retailer as the follower. The equilibrium strategies of the two players are obtained. Using the performance of the corresponding centralized syst...

Procurement, i.e., the process of obtaining materials or services and managing their inflow into organizations, is a critical process in supply chain management. Internet technologies offer attractive opportunities to reduce purchasing costs while increasing the speed and efficiency of the procurement process through seamless network integration and automated execution of key tasks. This paper ...

This Letter to the Editor is brought to you for free and open access by the Nursing at ODU Digital Commons. It has been accepted for inclusion in Nursing Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Bluestein, D.; Healey, A. C.; and Rutledge, C. M., "Re: Sleep and the Family Doctor: T...