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Bullwhip Effect (bullwhip + effect)
Selected AbstractsAn Analytical Investigation of the Bullwhip EffectPRODUCTION AND OPERATIONS MANAGEMENT, Issue 2 2004Roger D. H. Warburton The 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 theory results. Managerially useful ordering strategies are proposed. Exact expressions are derived for the retailer's orders to the manufacturer, and the Bullwhip Effect arises naturally. The approach is quite general and applicable to a wide variety of supply chain problems. [source] System dynamics modelling for supply-chain management: A case study on a supermarket chain in the UKINTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH, Issue 5 2004Y. Ge Abstract This paper presents a system dynamics (SD) approach for the analysis of the demand amplification problem, also known as the bullwhip effect, which has been studied fairly extensively in the literature. The construction of an SD model is reported using a part of a supermarket chain system in the UK as an example. Based on the model, the causes of the dynamic behaviour of the system and the sources of amplification from the downstream to the upstream of the chain are investigated. The impact of information delays, demand forecasting and information sharing on the performance of the multi-echelon supply chain is analysed. Some implementation issues are also addressed based on the simulation analysis. [source] A multi-agent control scheme for a supply chain model,ASIAN JOURNAL OF CONTROL, Issue 2 2008Mauro Boccadoro Abstract The reduction of the bullwhip effect on supply chain systems is generally achieved through the optimal choice of policies at the local level and also by setting some type of cooperation among the different agents of the system. Here, such constructive interaction is pursued by the introduction of a negotiation mechanism among neighboring sites, and according to revenues/costs directly related to the impact of the bullwhip effect on the performances of each site. The concept is demonstrated for a policy which is quite common in the supply chain literature. The results obtained show the convergence properties of the negotiation for particular disturbance signals, and give indications on how cooperating mechanisms can be devised on the basis of the proposed negotiation. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society [source] | ||||||||||