http://repub.eur.nl/res/aut/1782/ List of Publications en http://repub.eur.nl/static-eur/img/logo.png http://repub.eur.nl http://repub.eur.nl/res/pub/39722/ 2013-03-01T00:00:00Z In this study, we compare two common forms of product take-back legislation implementation: (i) manufacturer-operated systems, where the state imposes certain take-back objectives on manufacturers, and (ii) state-operated systems, where manufacturers or consumers finance take-back through recovery fees. We show that their impacts on different stakeholders, that is, social welfare, manufacturers, consumers, and the environment, can be significantly different and stakeholder preferences for these models vary depending on the operating environments (e.g., production and take-back costs, and environmental externalities). We also consider the impact of operational externalities such as operating and monitoring costs, and show how they affect stakeholder preferences. http://repub.eur.nl/res/pub/38281/ 2007-01-01T00:00:00Z With the attention of the chemical industry focused on exploiting the low cost feedstocks in the Middle East and the growth markets of Brazil, Russia, India, China and South East Asia, this report provides a timely reminder to policy makers, chemical companies and logistics service providers of the significant opportunities for improving business potential in Europe’s chemical clusters. Europe is still the largest, most sophisticated global market for chemical products, with a well developed, efficient, highly productive asset base, sound infrastructure, leading edge research and development and significant purchasing power. Provided these advantages are sustained, including continued attention to asset maintenance and operational and supply chain improvements, Europe can remain a competitive force in the global market place, despite what the doom-mongers may say to the contrary. ... http://repub.eur.nl/res/pub/2297/ 2004-01-01T00:00:00Z http://repub.eur.nl/res/pub/11588/ 2003-01-01T00:00:00Z The profitability of remanufacturing depends on the quantity and quality of product returns and on the demand for remanufactured products. The quantity and quality of product returns can be influenced by varying quality-dependent acquisition prices, i.e., by using product acquisition management. Demand can be influenced by varying the selling price. We develop a simple framework for determining the optimal prices and the corresponding profitability. We motivate and illustrate our framework using an application from the cellular telephone industry. http://repub.eur.nl/res/pub/1706/ 2001-11-28T00:00:00Z The profitability of remanufacturing depends on the quantity and quality of product returns and on the demand for remanufactured products. The quantity and quality of product returns can be influenced by varying quality dependent acquisition prices, i.e., by using product acquisition management. Demand can be influenced by varying the selling price. We develop a framework for determining the optimal prices and the corresponding profitability. http://repub.eur.nl/res/pub/108/ 2001-08-09T00:00:00Z Increased concern for the environment has lead to new techniques to design products and supply chains that are both economically and ecologically feasible. This paper deals with the product - and corresponding supply chain design for a refrigerator. Literature study shows that there are many models to support product design and logistics separately, but not in an integrated way. In our research we develop quantitative modelling to support an optimal design structure of a product, i.e. modularity, repairability, recyclability, as well as the optimal locations and goods flows allocation in the logistics system. Environmental impacts are measured by energy and waste. Economic costs are modelled as linear functions of volumes with a fixed set-up component for facilities. We apply this model using real life R&D data of a Japanese consumer electronics company. The model is run for different scenarios using different parameter settings such as centralised versus decentralised logistics, alternative product designs, varying return quality and quantity, and potential environmental legislation based on producer responsibility. http://repub.eur.nl/res/pub/109/ 2001-08-09T00:00:00Z This paper contains the dataset for the refrigerator case concerning the design of a production and return network for refrigerators. Section 1 emphasises the major changes to the problem structure and assumptions used by Umeda et al. (1999). Section 2 contains the parameter settings. Section 3 contains the distance matrix for all locations. http://repub.eur.nl/res/pub/11394/ 2001-01-01T00:00:00Z Efficient implementation of closed-loop supply chains requires setting up appropriate logistics structures for the arising flows of used and recovered products. In this paper, logistics network design in a reverse logistics context is considered. A generic facility location model is presented and differences with traditional logistics settings are discussed. The model is used to analyze the impact of product return flows on logistics networks. The influence of product recovery is very much context dependent. While product recovery may efficiently be integrated in existing logistics structures in many cases, other examples require a more comprehensive approach redesigning a company's logistics network in an integral way. http://repub.eur.nl/res/pub/2271/ 1999-05-01T00:00:00Z This paper is on production planning and inventory control in systems where manufacturing and remanufacturing operations occur simultaneously. Typical for these hybrid systems is, that both the output of the manufacturing process and the output of the remanufacturing process can be used to fulfill customer demands. Here, we consider a relatively simple hybrid system, related to a single component durable product. For this system, we present a methodology to analyse a PUSH control strategy (in which all returned products are remanufactured as early as possible) and a PULL control strategy (in which all returned products are remanufactured as late as is convenient). The main contributions of this paper are (i) to compare traditional systems without remanufacturing to PUSH and to PULL controlled systems with remanufacturing, and (ii) to derive managerial insights into the inventory related effects of remanufacturing. http://repub.eur.nl/res/pub/2275/ 1998-01-01T00:00:00Z The recovery of used products and materials is receiving growing attention as a result of depleted landfill and incineration capacities. From a logistical point of view these reuse opportunities give rise to a goods flow from the user back to the sphere of the producers. "Reverse logistics" is concerned with the management of this "reverse" goods flow. In this paper issues in reverse logistics are addressed from an operational research perspective. Recent contributions related to the areas of distribution planning and inventory management are discussed, and compared with traditional logistical settings. http://repub.eur.nl/res/pub/14327/ 1997-08-01T00:00:00Z The Tactical Fixed Interval Scheduling Problem (TFISP) is the problem of determining the minimum number of parallel nonidentical machines, such that a feasible schedule exists for a given set of jobs. In TFISP, each job must belong to a specific job class and must be carried out in a prespecified time interval. The problem is complicated by the restrictions that (1) each machine can handle only one job at a time, (2) each machine can handle only jobs from a subset of the job classes, and (3) preemption is not allowed. In this paper we discuss the occurrence of TFISP in practice, we analyze the computational complexity of TFISP, and we present exact and approximation algorithms for solving TFISP. The paper concludes with a computational study. http://repub.eur.nl/res/pub/2244/ 1997-01-01T00:00:00Z This article surveys the recently emerged field of reverse logistics. The management of return flows induced by the various forms of reuse of products and materials in industrial production processes has received growing attention http://repub.eur.nl/res/pub/6684/ 1995-04-06T00:00:00Z The Operational Fixed Interval Scheduling Problem (OFISP) is characterized as the problem of scheduling a number of jobs, each with a fixed starting time, a fixed finishing time, a priority index, and a job class. The objective is to find an assignment of jobs to machines with maximal total priority. The problem is complicated by the restrictions that: (i) each machine can handle only one job at a time, (ii) each machine can handle only jobs from a prespecified subset of all possible job classes, and (iii) preemption is not allowed. It follows from the above that OFISP has both the character of a job scheduling problem and the character of an assignment problem. In this paper we discuss the occurrence of the problem in practice, and we present newly developed exact and approximation algorithms for solving OFISP. Finally, some computational results are shown. http://repub.eur.nl/res/pub/19888/ 1995-01-01T00:00:00Z This article examines strategic production and operations management issues in product recovery management (PRM). PRM encompasses the management of all used and discarded products, components, and materials for which a manufacturing company is legally, contractually, or otherwise responsible. The objective of PRM is to recover as much of the economic (and ecological) value of used and discarded products, components, and materials as reasonably possible, thereby reducing the ultimate quantities of waste to a minimum. This article also discusses the relevance of PRM to durable products manufacturers. It contains a categorization of PRM decisions. A case study based on the PRM system of a multinational copier manufacturer is presented to illustrate a set of specific production and operations management issues. The experiences of two other pro-active manufacturers (BMW and IBM) are also discussed http://repub.eur.nl/res/pub/2239/ 1995-01-01T00:00:00Z http://repub.eur.nl/res/pub/14349/ 1994-12-01T00:00:00Z Develops a decision support system (DSS) for the aircraft maintenance department of KLM Royal Dutch Airlines at Schiphol Airport in Amsterdam, Netherlands. Tasks of the department; Support provided by the DSS to management; Analyzing several capacity planning problems related to the size and the organization of the workforce. http://repub.eur.nl/res/pub/14359/ 1991-07-01T00:00:00Z In this paper the Discrete Lotsizing and Scheduling Problem (DLSP) is considered. DLSP relates to capacitated lotsizing as well as to job scheduling problems and is concerned with determining a feasible production schedule with minimal total costs in a single-stage manufacturing process. This involves the sequencing and sizing of production lots for a number of different items over a discrete and finite planning horizon. Feasibility of production schedules is subject to production quantities being within bounds set by capacity. A problem classification for DLSP is introduced and results on computational complexity are derived for a number of single and parallel machine problems. Furthermore, efficient algorithms are discussed for solving special single and parallel machine variants of DLSP.