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APPLYING EQUAL PILES APPROACH TO DISASSEMBLY LINE BALANCING PROBLEM

Abstract Disassembly process decomposes a product into parts or subassemblies. Due to the uncertainties that occur during this process, designing and balancing a disassembly line is a very challenging problem. To deal with the disassembly line balancing problem a new method which relies on the equal piles approach is proposed.

A method for dealing with multi-objective optimization problem of disassembly processes

Disassembly of manufactured goods induces both disassembly costs and revenues from the parts saved by the process. Thus, a good trade-off has to be found that depends, both on the depth of the disassembly and on the sequence of operations. This optimization problem depends upon the structure of the disassembly system: if it is made of a single workstation, the costs depend mainly upon the process duration. If the system is a line, the costs depend mainly upon the line balancing, when it is highly manual. In this paper, the authors consider the line structure and propose an algorithm which allow one to find a disassembly sequence that optimizes a very simple function integrating the income from the parts, the material produced by the process and the cycle time of the disassembly line. An example is given to illustrate the proposed algorithm.

Real Time Balancing of Complex Disassembly Lines

The objective of the Disassembly Line Balancing Problem (DLBP) is to use the resources of the disassembly line as efficiently as possible while meeting the demand. This issue is hard to attempt due to the inherent uncertainties that occur during the process. Starting from real industrial examples, this article presents a simple-to-apply method to accomplish the balancing of complex disassembly lines in real time. The basic idea of this method is to use mixed integer quadratic programming and branch and cut algorithm on the disassembly precedence graph. Results of simulations for disassembling two industrial products are presented

A real time solution to control disassembly processes

Disassembly of manufactured products induces both disassembly costs and revenues from the parts saved by the process. At the planning stage a good trade-off has to be found between the costs of disassembly and the final profit. At the control stage it is important to assure an optimal balance of the line as well as the complete disassembly processing during the rest of the working time. A real time control method based on modeling of disassembly by the precedence graph and on a stochastic algorithm is presented in this article.

Determination of the Optimal Disassembly Sequence Using Decision Trees

Abstract Disassembly is the first stage in the process of valorization of the manufactured goods. Due to the degradations of the components, the disassembly of the product could be impossible. In order to maximize the outcome obtained considering the uncertainty of the disassembly process one has to decide the depth of this process. Applying the tools of the decision theory the authors have proposed a method and an application allowing the determination of the optimal disassembly sequence taking into account the considered criterion.

Decision Support Systems in Reverse Supply Chain Management

Abstract The paper aims at presenting the main issues concerning the Reverse Supply Chains (RSC) and the specific attributes of Decision Support Systems (DSS) meant to be used in the RSC management activities in line with the new Information and Communication Technologies (ICT). Having reviewed several main milestones of the way to the conscious environmental manufacturing systems, Reverse Supply Chain frameworks, architecture and activities are described. Initiatives and implementation solutions of Decision Support Systems for RSC in some European countries are also presented. In the final part, the role of pacing technologies to support green manufacturing development with main emphasis on issues such as agent technologies, cloud computing, big data and cyber physical systems is explained.

On the Profitability of the Disassembly Processes

Disassembly is part of reuse, recycling and disposal processes of the end-of-life manufactured products. Disassembly induces both costs and revenues. Costs are essentially determined by the line balancing and hence by the cycle time, while revenues are provided by the end-of-life values of the recovered parts and by the efficiency of the line. This work presents an optimization method that maximizes the income flow as well as the efficiency of the disassembly line. A case study on a multi- variant product is presented in the final part of the paper.

Integrating DSS in Public Transportation Monitoring Systems

Abstract Decision Support Systems (DSS) ensure the computer-based support for the conscientious decision-making in solving problems that require a large amount of information processing and complex scenarios. DSS for Transportation (DSST) are intelligent systems that are used at operational and organizational management levels. Operating a DSST in a public transportation web-based monitoring system is presented in this paper.

Disassembly scheduling for family of products

Abstract Once electronic products arrive at the end of their life, they are sent to be disassembled and certain parts are reused or recycled. The out-of-use products that come into a recycling process are of different types. They might be variants of the same product family. These variants are caused by the presence of optional components, functional differences, geometrical features or mark manufacturers. This article presents a method to develop the scheduling of the disassembly line by means of quadratic programming and branch and cut algorithm applied on an original function. Simulation results for family product variants are presented.

Collaborative Platform for Virtual Practice Enterprise Learning

Virtualizing structures, functions and operations of real companies, simulated enterprises provide a learning environment where learners acquire professional knowledge and practical skills. Collaborative networks for simulated enterprises allow participants performing management functions, virtual transaction or production simulations and developing entrepreneurial behaviors in a collaborative professional environment. This paper aims to present a functional collaborative environment for practice in virtual enterprises in which actors are students, universities and real companies.