Bullwhip effect is a widespread and serious problem in supply chain management, both domestic and foreign scholars studied and came to a conclusion consistently: That the main functions that cause bullwhip effect are need forecasts, batches ordering, and fluctuations in price, rational decisionmaking, and time deferment and in coordination, supply chain structure. Many scholars have done quanti...

The bullwhip effect describes the tendency for the variance of orders in supply chains to increase as one moves upstream from consumer demand. Previous research attributes this phenomenon to both operational and behavioral causes. Operational causes are features of the institutional setting that lead rational agents to amplify changes in demand, while behavioral causes arise from suboptimal dec...

Growing concern about health care costs in developed countries in the past two decades has spawned extensive research on the industry and, in particular, hospital management. The literature on the subject is extensive and covers a wide range of themes that include application of operational research-based tools, redesign/re-engineering of delivery systems and clinical procedures, and so forth. ...

Along with forward supply chain organization needs to consider the impact of reverse logistics due to its economic advantage, social awareness and strict legislations. In this paper, we develop a system dynamics framework for a closed-loop supply chain with fuzzy demand and fuzzy collection rate by incorporating product exchange policy in forward channel and various recovery options in reverse ...

Abstract: A simple dynamic model of a hybrid manufacturing / remanufacturing system is investigated. In particular we study an infinite horizon, continuous time, APIOBPCS (Automatic Pipeline Inventory and Order Based Production Control System) model. We specifically highlight the effect of remanufacturing lead-time and the return rate on the inventory variance and bullwhip produced by the order...

Bullwhip effect phenomenon is what reduces the efficiency of the supply chain. The effect occurs when demand changes in the supply chain face with a lot of volatility. So far, several key factors have been identified as causes of this phenomenon. Since the steel industry, is the basic one, its efficiency is of great importance. Therefore, in this study influencing factors on Bullwhip Effect in ...

T Bullwhip Effect is problematic: order variability increases as orders propagate along the supply chain. The fundamental differential delay equations for a retailer’s inventory reacting to a surge in demand are solved exactly. Much of the rich and complex inventory behavior is determined by the replenishment delay. The analytical solutions agree with numerical integrations and previous control...

The purpose of this paper is to examine production smoothing in supply chains. Using the controlled setting of the laboratory, we systematically investigate supply chain features that lead to production smoothing. In contrast to prior laboratory studies of the bullwhip effect, we find that the bullwhip effect disappears in several of our experiments. More importantly, our study shows that when ...

With the globalization and the development of information technology, supply chain has become a complex system. In this paper, ABMS(Agent-based model and simulation), as one of the scientific and dynamic research methods for complex system, is applied to establish a supply chain model and determine its abundant bullwhip effect phenomenon under swarm platform. Based on analysis of certain condit...

We consider a series of companies in a supply chain, each of which orders from its immediate upstream collaborators. Usually, the retailer's order do not coincide with the actual retail sales. The bullwhip effect refers to the phenomenon where orders to the supplier tend to have larger variance than sales to the buyer (i.e. demand distortion), and the distortion propagates upstream in an amplif...