In Support of Open-Loop Supply Chains: Expanding the scope of environmental sustainability in reverse supply chains

The final publication is available at Elsevier via https://doi.org/10.1016/j.scitotenv.2019.01.148 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/This study expands the environmental sustainability paradigm of reverse supply chains. The study examines the notion of closed-loop supply chains and suggests the use of the term in academia and business is too limited from a sustainability perspective. Three case examples in automotive remanufacturing were chosen to represent a global, multi-tier industry with documented circular economy strategies. A simple conceptual framework is developed that bridges different concepts of “loops” at whole product, component and material levels, and which is then used to show that closed-loop supply chains that focus on OEM activities appear to overlook alternative models of reverse supply chain loops. The study considers how these alternative loops contribute to environmental sustainability by looking at market dynamics and relations between business actors in supply chains in automotive remanufacturing. Alternative loops may contribute to product displacement activities in the market and thus provide positive environmental and resource results. The narrow focus on “closed loops” in supply-chain research and industry simplifies potential benefits and weaknesses, and overlooks the contribution of “open loops” in supply chains, which enable business innovation and can improve sustainability outcomes in product and material supply chains. This article fills a void in supply chain management research and argues for a more adaptive management approach to reverse supply chains for end-of-life products.German Federal Ministry of Education and Research, Grant 01LN1310AGerman Academic Exchange ServiceGerman Federal Ministry of Education and Researc

Active control of blankholder in sheet metal stamping

Abstract The continuous demand of shape complexity, product accuracy and extended tools life has led to a widespread use of auxiliary systems in sheet metal stamping. Nevertheless, their performances are often inadequate, making their use a compromise between process efficiency and stability. The paper focuses on a new magneto-rheological actuator design. Both analytical and numerical approaches are developed to evaluate load response and to optimize the magnetic field interaction. A physical prototype according to the design outputs is manufactured and tested at different dynamic conditions. Finally, magnetic force values obtained from FE model and experimental tests are compared

The Current Status and Impact of 3D Printing Within the Industrial Sector: An Analysis of Six Case Studies

3D Printing is a term used to describe a range of digital manufacturing technologies. The technology is used to produce component parts layer-by-layer through the use of materials and there are many different types of 3D printing processes. The shift in manufacturing capability has raised questions relating to intellectual property law. 3D printing now paves the way for modified, replicated and changed parts which could then be shared, used and sold. This clearly has implications for intellectual property owners. This Study produced for the UK Intellectual Property Office presents the second part of a two-part study and represents a series of case studies and interviews from the industrial sector

Cascade Use and the Management of Product Lifecycles

This paper explores the challenges related to the End-Of-Life phase of products and circular systems of reuse and recycling within the commonly established frameworks of product lifecycles. Typically, Original Equipment Manufacturer-centric supply chain perspectives neglect the complexity at the End-Of-Life where many third-parties are involved in reuse and recycling activities. Based on a review of product lifecycle and related recycling literature, this study proposes the application of ‘cascades’, a term originally coined within the biomass domain. We propose and subsequently apply the ‘cascade use methodology’ and identify additional and value-adding End-Of-Life solutions for products and materials. The adoption of cascade utilization into product lifecycles is analyzed and critically discussed using case studies from independent remanufacturing and tire recycling, focusing on the End-Of-Life while excluding business models as renting or sharing. Although theoretically feasible, we argue that the practical adoption of ‘cascade use’ deserves more attention from researchers and practitioners in order to become an integral part of the comprehensive management of product lifecycles

Production Systems with Deteriorating Product Quality : System-Theoretic Approach

Manufacturing systems with perishable products are widely seen in practice (e.g., food, metal processing, etc.). In such systems, the quality of a part is highly dependent on its residence time within the system. However, the behavior and properties of these systems have not been studied systematically, and, therefore, is carried out in this dissertation. Specifically, it was assumed that the probability that each unfinished part is of good quality is a decreasing function of its residence time in the preceding buffer. Then, in the framework of serial production lines with machines having Bernoulli and geometric reliability models, closed-form formulas for performance evaluation in the two-machine line case were derived, and develop an aggregation-based procedure to approximate the performance measures in M\u3e2-machine lines. In addition, the monotonicity properties of these production lines using numerical experiments were studied. A case study in an automotive stamping plant is described to illustrate the theoretical results obtained. Also, Bernoulli serial lines with controlled parts released was analyzed for both deterministic and stochastic releases. Finally, bottleneck analysis in Bernoulli serial lines with deteriorating product quality were studied

Supply chain strategies in an era of natural resource scarcity

Purpose: The purpose of this paper is to explore the implications of natural resource scarcity (NRS) for companies’ supply chain strategies. Design/methodology/approach: Drawing on the resource dependence theory (RDT), a conceptual model is developed and validated through the means of exploratory research. The empirical work includes the assessment of qualitative data collected via 22 interviews representing six large multinational companies from the manufacturing sector. Findings: When the resources are scarce and vitally important, companies use buffering strategies. Buffering and bridging strategies are preferred when there are a few alternative suppliers for the specific resource and when there is limited access to scarce natural resources. Research limitations/implications: The research focuses on large multinational manufacturing companies so results may not be generalised to other sectors and to small- and medium-sized firms. Future research needs to examine the implications of NRS for organisational performance. Practical implications: This research provides direction to manufacturing companies for adopting the best supply chain strategy to cope with NRS. Originality/value: This paper adds to the body of knowledge by providing new data and empirical insights into the issue of NRS in supply chains. The RDT has not been previously employed in this context. Past studies are mainly conceptual and, thus, the value of this paper comes from using a qualitative approach on gaining in-depth insights into supply chain-related NRS strategies and its antecedents

Remanufacturing and product design: designing for the 7th generation

The following is taken directly from the research report. This report investigates Design for Remanufacture in terms of both detailed product design and the business context in which Design for Remanufacture may operate. Key Study Objectives • To understand the link between design and remanufacture • To understand how Design for Remanufacture can lead to increased innovation and Sustainable Development (SD) • To identify proactive strategies to further Design for Remanufactur

Automotive manufacturing technologies – an international viewpoint

The automotive industry can be described as a backbone in many developed countries such as Japan, Korea, USA, and Germany, while being an enabler for economic prosperity in developing countries like China, Brazil, Eastern Europe, and Russia at the same time. However, the dynamics and uncertainty are increasing heavily by market changes, regulations, customer behavior, and new product technologies. Manufacturing research has to find answers to increase quality of products, flexibility of plants, and supply chain networks, to manage complexity in technologies and variants and overall to stay competitive even in high wage countries. In this paper, major technological challenges are discussed and the current state of manufacturing technology and research is presented. Moreover, for each technological and organizational area, future industrial, and research challenges are highlighted