Reverse supply chains: A source of opportunities and challenges

Reverse supply chains: A source of opportunities and challenges

A Goal Programming Approach to the Remanufacturing Supply Chain Model

Copyright 2001 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.The current trend of depletion of natural resources due to an ever-increasing number of consumer goods manufactured has led to an increase in the quantity of used and outdated products discarded. From an environmental point of view, it is not only desirable to disassemble, reuse, remanufacture and/or recycle the discarded products, in many cases it can also be economically justified. This situation being the motive, in recent years there have been several studies reported on disassembly, remanufacturing and/or recycling environments. Since “environmentally conscious manufacturing" is a relatively new concept that brings new costs and profits into consideration, its analysis cannot be provided by readily available techniques. This paper presents a quantitative methodology to determine the allowable tolerance limits of planned/unplanned inventory in a remanufacturing supply chain environment based on the decision-maker’s unique preferences. To this end, an integer goal-programming model that provides a unique solution for the allowable inventory level is presented. The objective of the supply-chain model is to determine the number of a variety of components to be kept in the inventory while economically fulfilling the demand of a multitude of components, and yet have an environmentally benign policy of minimizing waste generation.A numerical example is presented to illustrate the methodology.http://dx.doi.org/10.1117/12.41726

A Genetic Algorithm for Disassembly Process Planning

Copyright 2001 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.When a product reaches it’s end-of-life, there are several options available for processing it including reuse, remanufacturing, recycling, and disposing (the least desirable option). In almost all cases, a certain level of disassembly may be necessary. Thus, finding an optimal (or near optimal) disassembly sequence is crucial to increasing the efficiency of the process. Disassembly operations are labor intensive, can be costly, have unique characteristics and cannot be considered as reverse of assembly operations. Since the complexity of determining the best disassembly sequence increases with the increase in the number of parts of the product, it is extremely crucial that an efficient methodology for disassembly process planning be developed. In this paper, we present a genetic algorithm for disassembly process planning. A case example is considered to demonstrate the functionality of the algorithm.http://dx.doi.org/10.1117/12.45526

Karbon emisyon politikalarının tersine tedarik zincir ağı tasarımı üzerindeki etkileri

Reverse Supply Chain is described as an initiative that plays an important role in the global supply chain for those who seek environmentally responsible solutions for their end-of-life products. The relative economic and environmental benefits of reverse supply chain are influenced by costs and emissions during collection, transportation, recovery facilities, disassembly, recycling, remanufacturing, and disposal of unrecoverable components. The design of reverse supply chain network takes into account social, economic and environmental objectives. This paper addresses the design of reverse supply chain under the three common regulatory policies, strict carbon caps, carbon tax, and carbon cap-and-trade.Küresel tedarik zincirinde önemli bir rol oynayan tersine tedarik zinciri, ömrünü tamamlamış ürünler için çevreye karşı sorumlu çözümler arayanların bir girişimi olarak tanımlanmaktadır. Tersine tedarik zincirinin nispi ekonomik ve çevresel faydaları, toplama, nakliye, geri kazanım tesisleri, demontaj, geri dönüşüm, yeniden imalat ve geri dönüşü olmayan bileşenlerin imha edilmesi sırasında oluşan maliyetler ve emisyonlardan etkilenmektedir. Tersine tedarik zinciri ağ tasarımı sosyal, ekonomik ve çevresel hedefleri dikkate almaktadır. Bu makale, sıkı karbon kapsülleri, karbon vergisi, karbon emisyon üst sınırı ve ticareti olmak üzere üç ortak düzenleyici politikada ters tedarik zincirinin tasarımını ele almaktadır

The Impact of Carbon Emissions Policies on Reverse Supply Chain Network Design

Reverse Supply Chain is described as an initiative that plays an important role in the global supply chain for those who seek environmentally responsible solutions for their end-of-life products. The relative economic and environmental benefits of reverse supply chain are influenced by costs and emissions during collection, transportation, recovery facilities, disassembly, recycling, remanufacturing, and disposal of unrecoverable components. The design of reverse supply chain network takes into account social, economic and environmental objectives. This paper addresses the design of reverse supply chain under the three common regulatory policies, strict carbon caps, carbon tax, and carbon cap-and-trade

The Impact of Carbon Emissions Policies on Reverse Supply Chain Network Design

Reverse Supply Chain is described as an initiative that plays an important role in the global supply chain for those who seek environmentally responsible solutions for their end-of-life products. The relative economic and environmental benefits of reverse supply chain are influenced by costs and emissions during collection, transportation, recovery facilities, disassembly, recycling, remanufacturing, and disposal of unrecoverable components. The design of reverse supply chain network takes into account social, economic and environmental objectives. This paper addresses the design of reverse supply chain under the three common regulatory policies, strict carbon caps, carbon tax, and carbon cap-and-trade

Warranty and Maintainability Analysis for Sensor Embedded Remanufactured Products in Reverse Supply Chain Environment

Remanufactured products are very popular with consumers due to their appeal to offer the latest technology with lower prices compared to brand new products. The quality of a remanufactured product induces hesitation for many consumers, in regards to its efficacy and reliability. One stratagem that remanufacturers could employ to encourage customer security are product warranties. This paper studies and scrutinizes the impact that would be had by offering renewing warranties on remanufactured products. This study was able to determine the optimal costs of warranty for two-dimensional non-renewable warranty offered on remanufactured products using the simulation model and design of experiments

The Use of Data Envelopment Analysis for Product Recovery

Copyright 2003 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.The latest enhancements in industrial technologies, especially the ones in electronics industry, have provided organizations with the ability to manufacture faster and more economical products. This fact, coupled with the growing interest and demand for the latest technology, have led electronic equipment manufacturers to start producing “hightech” and “personalized” products at an increasing rate. This has led to a high rate of obsolescence for electronic products worldwide, even though the majority of these “obsolete” products still function. In this paper, we investigate a product recovery facility where the end-of-life (EOL) products are taken back from the last users and are brought into the facility for processing. We assume that there are multiple types of EOL products and that a combination of these can be disassembled to provide for a sufficient number of demanded components and materials. We then present a data envelopment analysis (DEA) algorithm to determine the number and types of the EOL products that will be required to fulfill the demand. A numerical example is presented to demonstrate the functionality of the methodology.http://dx.doi.org/10.1117/12.51653

Management of a Disassembly Line using Two Types of Kanbans

The continuous growth in consumer waste has seriously threatened the environment. For this reason, environment conscious manufacturing has emerged to be an important attribute that has been embraced by companies to support the environmental laws, social responsibilities as well as profitability resulting in increased awareness of product recovery. One of the first operations in product recovery is disassembly which involves the separation of the desired components, subassemblies, and materials from end-of-life or returned products. A disassembly line is perhaps the most suitable setting for disassembly of products in large quantities. In this paper, a multi-kanban mechanism using two types of kanbans, viz., a component kanban and a subassembly kanban, is used to control the disassembly line. We consider an example from the automobile industry to illustrate the methodology and investigate the fluctuations in components and subassemblies inventories, average waiting times and backorder rates using simulation. The results demonstrate the effectiveness of utilizing the multi-kanban mechanism in a disassembly line