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Full-Text Articles in Engineering
Use Of Data Envelopment Analysis For Product Recovery, Nuriye Elif Kongar, Surendra M. Gupta, Seamus M. Mcgovern
Use Of Data Envelopment Analysis For Product Recovery, Nuriye Elif Kongar, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
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 ""high-tech"" 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 …
Solving Disassembly Sequence Planning Problems Using Combinatorial Optimization, Surendra M. Gupta, Seamus M. Mcgovern, Sagar V. Kamarthi
Solving Disassembly Sequence Planning Problems Using Combinatorial Optimization, Surendra M. Gupta, Seamus M. Mcgovern, Sagar V. Kamarthi
Seamus McGovern
Disassembly activities take place in various recovery operations including remanufacturing, recycling, and disposal. The disassembly line is the best choice for automated disassembly of returned products, a feature that will be become crucial in the future. It is, therefore, important that the disassembly line be designed and balanced so that it works as efficiently as possible. However, finding the optimal balance is computationally intensive with exhaustive search quickly becoming prohibitively large, even for relatively small products. In this paper, we solve the disassemb ly line balancing problem using combinatorial optimization techniques, which are instrumental in obtaining near-optimal solutions to problems …
Multi-Criteria Ant System And Genetic Algorithm For End-Of-Life Decision Making, Surendra M. Gupta, Seamus M. Mcgovern
Multi-Criteria Ant System And Genetic Algorithm For End-Of-Life Decision Making, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
Disassembly takes place in remanufacturing, recycling, and disposal with a line being the best choice for automation. The disassembly line balancing problem seeks a sequence which: is feasible, minimizes workstations, and ensures similar idle times, as well as other, disassembly-specific concerns. Finding the optimal balance is computationally intensive due to factorial growth. Ant colony optimization and genetic algorithm metaheuristics are presented and compared along with an exa mple to illustrate the implementation. Conclusions drawn include the consistent generation of optimal or near-optimal solutions, the ability to preserve precedence, the speed of the metaheuristics, and their practicality due to ease of …
Disassembly Sequencing Problem: A Case Study Of A Cell Phone, Evren Erbis, Seamus M. Mcgovern, Surendra M. Gupta
Disassembly Sequencing Problem: A Case Study Of A Cell Phone, Evren Erbis, Seamus M. Mcgovern, Surendra M. Gupta
Seamus McGovern
Selection of an optimal disassembly sequence is essential for the efficient processing of a product at the end of its life. Disassembly sequences are listings of disassembly actions (such as the separation of an assembly into two or more subassemblies, or removing one or more connections between components). Disassembly takes place in remanufacturing, recycling, and disposal with a disassembly line being the best choice for automation. In this paper, the disassembly sequencing problem is solved for a cell phone case on a disassembly line, seeking a sequence which is feasible, minimizes the number of workstations (and hence idle times), provides …
Computational Complexity Of A Reverse Manufacturing Line, Surendra M. Gupta, Seamus M. Mcgovern
Computational Complexity Of A Reverse Manufacturing Line, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
Disassembly has recently gained attention in the literature due to its role in product recovery. Disassembly activities take place in various recovery operations including remanufacturing, recycling, and disposal. The disassembly line is the best choice for automated disassembly of returned products. It is therefore important that the disassembly line be designed and balanced so that it works as efficiently as possible. However, finding the optimal balance is computationally intensive with exhaustive search quickly becoming prohibitively large, even for relatively small products, due to exponential growth. In this paper, complexity theory is reviewed and used to prove that the DISASSEMBLY LINE …
Stochastic And Deterministic Combinatorial Optimization Solutions To An Electronic Product Disassembly Flow Shop, Surendra M. Gupta, Seamus M. Mcgovern
Stochastic And Deterministic Combinatorial Optimization Solutions To An Electronic Product Disassembly Flow Shop, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
Disassembly takes place in remanufacturing, recycling and disposal, with a flow shop being the best choice for automation. The disassembly line balancing problem seeks a sequence which: is feasible, minimizes workstations, and ensures similar idle times, as well as other end-of-life specific concerns. Finding the optimal balance is computationally intensive due to exponential growth. Combinatorial optimization methods hold promise for providing solutions to the problem, which is proven NP-hard. Stochastic (genetic algorithm) and deterministic (greedy/hill-climbing hybrid heuristic) methods are presented and compared. Numerical results are obtained using a recent electronic product case study.
Uninformed And Probabilistic Distributed Agent Combinatorial Searches For The Unary Np-Complete Disassembly Line Balancing Problem, Surendra M. Gupta, Seamus M. Mcgovern
Uninformed And Probabilistic Distributed Agent Combinatorial Searches For The Unary Np-Complete Disassembly Line Balancing Problem, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
Disassembly takes place in remanufacturing, recycling and disposal, with a line being the best choice for automation. The disassembly line balancing problem seeks a sequence which: is feasible, minimizes workstations, and ensures similar idle times, as well as other end-of-life specific concerns. Finding the optimal balance is computationally intensive due to exponential growth. Combinatorial optimization methods hold promise for providing solutions to the disassembly line balancing problem, which is proven here to belong to the class of unary NP-complete problems. Probabilistic (ant colony optimization) and uninformed (H-K) search methods are presented and compared. Numerical results are obtained using a recent …
Combinatorial Optimization Methods For Disassembly Line Balancing, Seamus M. Mcgovern, Surendra M. Gupta
Combinatorial Optimization Methods For Disassembly Line Balancing, Seamus M. Mcgovern, Surendra M. Gupta
Seamus McGovern
Disassembly takes place in remanufacturing, recycling, and disposal with a line being the best choice for automation. The disassembly line balancing problem seeks a sequence which: minimizes workstations, ensures similar idle times, and is feasible. Finding the optimal balance is computationally intensive due to factorial growth. Combinatorial optimization methods hold promise for providing solutions to the disassembly line balancing problem, which is proven to belong to the class of NP-complete problems. Ant colony optimization, genetic algorithm, and H-K metaheuristics are presented and compared along with a greedy/hill-climbing heuristic hybrid. A numerical study is performed to illustrate the implementation and compare …
Metaheuristic Technique For The Disassembly Line Balancing Problem, Surendra M. Gupta, Seamus M. Mcgovern
Metaheuristic Technique For The Disassembly Line Balancing Problem, Surendra M. Gupta, Seamus M. Mcgovern
Seamus McGovern
The disassembly line is the best choice for automated disassembly of returned products. However, finding the optimal balance for a disassembly line is computationally intensive with exhaustive search quickly becoming prohibitively large. Metaheuristic techniques provide a general algorithmic framework that can be applied to this optimization problem. Although metaheuristics show promise in solving this complex problem, challenges exist in the variety of evaluation criteria available, a lack of disassembly-specific data sets for metaheuristic testing and a lack of performance analysis tools. In this paper, a balance performance measure is reviewed along with a sizeindependent a priori data set and graphical …
Case-Based Reasoning Disassembly System, Ibrahim Zeid, Surendra M. Gupta, Li Pan
Case-Based Reasoning Disassembly System, Ibrahim Zeid, Surendra M. Gupta, Li Pan
Ibrahim Zeid
This paper presents a new approach to address the problem of Planning for Disassembly (PFD). The approach is based on the Case-based reasoning technique. To assist planners to solve PFD problems, a system must have some heuristics and domain specific knowledge, which is related to the representation of the disassembly knowledge. In previous work, the authors suggested to use EMOPs (Eposodic Memory Organization Packet) for the knowledge representation of the PFD plan. This paper demonstrates the implementation of the EMOP memory model. The model has been implemented in C++, and tested. An example is presented to demonstrate the capabilities of …
Disassembly Knowledge Representation Via Xml, Ibrahim Zeid, Surendra M. Gupta
Disassembly Knowledge Representation Via Xml, Ibrahim Zeid, Surendra M. Gupta
Ibrahim Zeid
Extensible markup language (XML) is a new powerful technique for Web and Internet development. It is a method of defining structured data in a text file. XML is expected to do for data what HTML has done for Web pages. XML's strength lies in its simplicity to represent data and knowledge. It can maintain hierarchical structures encountered in many systems including assemblies and disassemblies. It can also be well integrated with Java, and its Java beans. Its strength lies in its flexibility to adapt to any knowledge domain because it is a metalanguage. It is used to develop modeling languages …
Simulation Study On Vehicle Dispatching Strategies For Returnable Transport Packaging, Sagar V. Kamarthi, Surendra M. Gupta, Jarupan Lerpong
Simulation Study On Vehicle Dispatching Strategies For Returnable Transport Packaging, Sagar V. Kamarthi, Surendra M. Gupta, Jarupan Lerpong
Sagar Kamarthi
Returnable transport packaging plays an important role in facilitating the transfer of a large volume of products in a close-loop distribution network. To make effective use of returnable transport packaging, vehicle dispatching strategies are crucial. With an appropriate vehicle dispatching strategy, for example, a fast turnover time and a short waiting time for packaging dispatch can be achieved. However, there are some factors that directly influence vehicle dispatching strategies. These factors include the arrival demand fluctuations, the availability of serving vehicles, and the geographic proximity of the facility to the customer's locations. In this study, authors investigate the effect of …
Complications In Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta, Kishore Pochampally, Sagar V. Kamarthi
Complications In Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta, Kishore Pochampally, Sagar V. Kamarthi
Sagar Kamarthi
Disassembly line is, perhaps, the most suitable way for the disassembly of large products or small products in large quantities. In this paper, we address the disassembly line balancing problem (DLBP) and the challenges that come with it. The objective of balancing the disassembly line is to utilize the disassembly line in an optimized fashion while meeting the demand for the parts retrieved from the returned products. Although, the traditional line balancing problem for assembly has been studied for a long time, so far, no one has formally talked about the DLBP. In this work, our primary objective is to …
Solving Disassembly Sequence Planning Problems Using Combinatorial Optimization, Surendra M. Gupta, Seamus M. Mcgovern, Sagar V. Kamarthi
Solving Disassembly Sequence Planning Problems Using Combinatorial Optimization, Surendra M. Gupta, Seamus M. Mcgovern, Sagar V. Kamarthi
Sagar Kamarthi
Disassembly activities take place in various recovery operations including remanufacturing, recycling, and disposal. The disassembly line is the best choice for automated disassembly of returned products, a feature that will be become crucial in the future. It is, therefore, important that the disassembly line be designed and balanced so that it works as efficiently as possible. However, finding the optimal balance is computationally intensive with exhaustive search quickly becoming prohibitively large, even for relatively small products. In this paper, we solve the disassemb ly line balancing problem using combinatorial optimization techniques, which are instrumental in obtaining near-optimal solutions to problems …
Modeling Smart Sensor Integrated Manufacturing Systems, Sagar V. Kamarthi, Surendra M. Gupta, Vadde Srikanth
Modeling Smart Sensor Integrated Manufacturing Systems, Sagar V. Kamarthi, Surendra M. Gupta, Vadde Srikanth
Sagar Kamarthi
Smart sensors and their networking technology when applied in manufacturing environment for monitoring, diagnostics, and control and for data/information collection could dwarf all the advances made so far by the manufacturing community through traditional sensors. Smart sensors can significantly contribute to improving automation and reliability through high sensitivity, self-calibration and compensation of non-linearity, low-power operation, digital preprocessed output, self-checking and diagnostic modes, and compatibility with computers and other subsystem blocks. There is a huge gulf between the existing models of manufacturing systems and the computational models that are required to correctly characterize manufacturing systems integrated with smart sensor networks. This …
Evaluation Of Trade-Offs In Costs And Environmental Impacts For Returnable Packaging Implementation, Sagar V. Kamarthi, Surendra M. Gupta, Jarupan Lerpong
Evaluation Of Trade-Offs In Costs And Environmental Impacts For Returnable Packaging Implementation, Sagar V. Kamarthi, Surendra M. Gupta, Jarupan Lerpong
Sagar Kamarthi
The main thrust of returnable packaging these days is to provide logistical services through transportation and distribution of products and be environmentally friendly. Returnable packaging and reverse logistics concepts have converged to mitigate the adverse effect of packaging materials entering the solid waste stream. Returnable packaging must be designed by considering the trade-offs between costs and environmental impact to satisfy manufacturers and environmentalists alike. The cost of returnable packaging entails such items as materials, manufacturing, collection, storage and disposal. Environmental impacts are explicitly linked with solid waste, air pollution, and water pollution. This paper presents a multi-criteria evaluation technique to …
Pricing End-Of-Life Components, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Pricing End-Of-Life Components, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Sagar Kamarthi
The main objective of a product recovery facility (PRF) is to disassemble end-of-life (EOL) products and sell the reclaimed components for reuse and recovered materials in second-hand markets. Variability in the inflow of EOL products and fluctuation in demand for reusable components contribute to the volatility in inventory levels. To stay profitable the PRFs ought to manage their inventory by regulating the price appropriately to minimize holding costs. This work presents two deterministic pricing models for a PRF bounded by environmental regulations. In the first model, the demand is price dependent and in the second, the demand is both price …
Prediction Of Packaging Life-Cycle Design Performance, Surendra M. Gupta, Lerpong Jarupan, Sagar V. Kamarthi
Prediction Of Packaging Life-Cycle Design Performance, Surendra M. Gupta, Lerpong Jarupan, Sagar V. Kamarthi
Sagar Kamarthi
We develop a back-propagation neural network (BPN) to predict the life-cycle design performance for transport packaging. The BPN is constructed and trained on the packaging design attributes to detect hidden relationships among historical or pre-existing life-cycle design data to predict a new concept design through supervised learning, by minimizing the squared difference between the actual and the predicted life-cycle design performance. To this end, the designer could use the predicted life-cycle design in a trade-off analysis and concept selection for a potential packaging design. A case example is used to illustrate the methodology.
Product Take-Back: Sensors-Based Approach, Sagar V. Kamarthi, Surendra M. Gupta, Zeid Ibrahim
Product Take-Back: Sensors-Based Approach, Sagar V. Kamarthi, Surendra M. Gupta, Zeid Ibrahim
Sagar Kamarthi
The driving forces behind product take-back and green manufacturing are well established. The two main product end-of-life options are reuse/remanufacturing and recycling. For either option, all take-back units are treated equally because no information that tracks the conditions of a product during its useful life is available. For example, all expired PCs are treated equally, no distinction can be made about which units still have healthy hard disks. This paper discusses sensor-based monitoring and prognostic methodologies for tracking the condition of products while being used by customers and timely and targeted servicing, smart and selective disassembling and refurbishing of products …
Application Of Combinatorial Approach In Packaging Material Selection, Lerpong Jarupan, Sagar V. Kamarthi, Surendra M. Gupta
Application Of Combinatorial Approach In Packaging Material Selection, Lerpong Jarupan, Sagar V. Kamarthi, Surendra M. Gupta
Sagar Kamarthi
Packaging material selection (PMS) problems have always been important to packaging designers and engineers. Not only does the selection of packaging material determine the costs and the environmental impacts of packaging, but also influences packaging physical characteristics and associated manufacturing methods. In order to reduce economic and environmental impacts, one has to take a holistic approach to packaging material selection by considering material effects throughout the packaging life cycle. To evaluate economic costs and environmental impacts both quantitative factors and subjective criteria play an important role in the packaging design. In the present work, fuzzy set theory is used for …
Pricing Decisions For Product Recovery Facilities In A Multi-Criteria Setting Using Genetic Algorithms, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Pricing Decisions For Product Recovery Facilities In A Multi-Criteria Setting Using Genetic Algorithms, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Sagar Kamarthi
Independent and small scale product recovery facilities (PRFs) often struggle to achieve profits when faced with inconsistent inflows of discarded products, varying demand patterns for recovered components, and stringent environmental regulations. Inconsistent inflows coupled with the varying demand cause undue fluctuations in inventory levels and frequently affect costs involved in product recovery operations. An effective pricing strategy can stabilize the fluctuations in demand and consequently can allow PRFs to control inventory levels. This research determines the prices of reusable and recyclable components and acquisition price of discarded products that allow PRFs to simultaneously maximize their financial returns and minimize the …
Dynamic Kanban System For Disassembly Line Applied To An Industrial Voice Recognition Client Unit, Surendra Gupta, Elif Kizilkaya
Dynamic Kanban System For Disassembly Line Applied To An Industrial Voice Recognition Client Unit, Surendra Gupta, Elif Kizilkaya
Surendra M. Gupta
In this paper, we apply the Dynamic Kanban System for Disassembly Line (DKSDL) to an industrial setting. The product considered is a second-generation industrial voice recognition client unit. The company manufacturing this device has moved on to the next generation device, which has more memory, faster CPU and a standardized OS support. There are many of the older generation clients in the customer base, which are being upgraded to the new generation resulting in a large number of the older units at hand. These units are being returned to the manufacturing facility to be processed. The casing and some other …
Capacity And Buffer Trade-Offs In A Remanufacturing System, Hasan Kivanc Aksoy, Surendra M. Gupta
Capacity And Buffer Trade-Offs In A Remanufacturing System, Hasan Kivanc Aksoy, Surendra M. Gupta
Surendra M. Gupta
In this paper, we examine the tradeoffs between increasing the number of buffers and increasing the capacity at the remanufacturing stations under numerous circumstances on such performance measures as expected total cost, average WIP inventory, throughput and average processing (remanufacturing) time when the remanufacturing stations are operating in uncertain environments. We model the remanufacturing system using an open queueing network with finite buffers and unreliable servers. In order to analyze the queueing network, we use the decomposition principle and expansion methodology. Each server in the system is subject to breakdown and has a finite buffer capacity.
Multi-Criteria Decision Making For Disassembly-To-Order System Under Stochastic Yields, Surendra Gupta
Multi-Criteria Decision Making For Disassembly-To-Order System Under Stochastic Yields, Surendra Gupta
Surendra M. Gupta
In this paper, we consider the problem of determining the optimal number of returned products to disassemble to fulfill the demand for a specified number of parts. This is known as the disassembly-to-order (DTO) problem. The deterministic yield version of this problem has been addressed in the literature. Recently, the stochastic yield version of this problem with a single objective has also been reported in the literature. In this paper, we extend the methodology to include multiple objectives. To this end, we model the DTO problem using integer goal programming. The stochastic problem is solved by transforming it into its …
Effective Marketing Of A Closed-Loop Supply Chain Network: A Fuzzy Qfd Approach, Surendra M. Gupta, Satish Nukala
Effective Marketing Of A Closed-Loop Supply Chain Network: A Fuzzy Qfd Approach, Surendra M. Gupta, Satish Nukala
Surendra M. Gupta
Both consumer and government concerns for the environment are driving many original equipment manufacturers (OEM) to engage in additional series of activities stemming from the reverse supply chain. The combination of forward/traditional supply chain and reverse supply chain forms the closed-loop supply chain. Apart from its efficient design, the success of a closed-loop supply chain network depends on its marketing strategy as well. Hence, it is important that the planned marketing strategy be evaluated with respect to the drivers of public participation in the network. To this end, we identify the important drivers of public participation and propose a fuzzy …
Economic Analysis Of End-Of-Life Computer Systems In Educational Institutions, Elif A. Kizilkaya, Surendra M. Gupta, Dincer Mehmet
Economic Analysis Of End-Of-Life Computer Systems In Educational Institutions, Elif A. Kizilkaya, Surendra M. Gupta, Dincer Mehmet
Surendra M. Gupta
In this paper we address the operational and economical aspects of EOL computer systems at educational institutions. To this end we present an actual case study of a major university in Boston and provide an economical analysis of different options such as disposal, disassembly, recycling, reuse and re-sale of these systems. We recommend a new procedure that will improve the collection and handling processes leading to a structured decision making methodology.
Performance Measurement In A Closed-Loop Supply Chain Network, Surendra M. Gupta, Satish Nukala
Performance Measurement In A Closed-Loop Supply Chain Network, Surendra M. Gupta, Satish Nukala
Surendra M. Gupta
An effective management of supply chain is a key factor for the better realization of organizational goals and customer expectations. In the era of globalization of markets and business process outsourcing, many firms realize the importance of continuous monitoring of the performance of their supply chains for its effectiveness and efficiency. In the modern era, performance measurement has a far more significant role than just quantification and accounting. It provides the management important feedback to monitor performance, reveal progress, diagnose problems and enhances transparency among the several tiers of the supply chain thus making a phenomenal contribution to decision making …
Customer Integrated Production System Analysis, Surendra M. Gupta, Louis Brennan
Customer Integrated Production System Analysis, Surendra M. Gupta, Louis Brennan
Surendra M. Gupta
This paper addresses the increasingly prevalent phenomenon of customer integrated production systems. In particular, it examines the operation of systems where customer integration has been enabled by the implementation of EDI and where supply chain uncertainty exists. A simulation model of such a system was employed to analyze four different production systems operating under different batch procedures and cost scenarios. Numerous experiments were conducted and the results obtained were analyzed. Several conclusions relating to customer behavior pattern and supply chain uncertainty were drawn from this analysis.
Substitution Policies For A Hybrid System, Surendra M. Gupta
Substitution Policies For A Hybrid System, Surendra M. Gupta
Surendra M. Gupta
As a consequence of environmental necessities, reuse of products has recently become an important issue for production and planning. Many companies are involved in retrieving used products, where they repair, refurbish and upgrade the products in order to sell them for profit. However, the regulations for many markets do not allow manufacturers to sell remanufactured products under the same pretence as new products. Therefore, companies are forced to differentiate both the recovery and the sales activities for the remanufactured products from that of the new products. In this paper, we study the impact of this differentiation. We particularly look at …
Selection Of Collection Centers And Recovery Facilities For Designing A Reverse Supply Chain, Surendra Gupta, Gupta Sushil, Pochampally Kishore
Selection Of Collection Centers And Recovery Facilities For Designing A Reverse Supply Chain, Surendra Gupta, Gupta Sushil, Pochampally Kishore
Surendra M. Gupta
The designing of a reverse supply chain must involve selection of collection centers and recovery facilities that have sufficient success potentials. These success potentials depend heavily on the participation of the following three important groups who have multiple, conflicting, and incommensurate criteria for evaluation, and so, the potentials must be evaluated based on the maximized consensus among those groups: (i) Consumers (whose primary concern is convenience), (ii) Local government officials (whose primary concern is environmental consciousness), and (iii) Supply chain company executives (whose primary concern is profit). In this paper, we propose a three-phase multi-criteria group approach to select collection …