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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 …
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
Surendra M. Gupta
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 …
Environmental Practices Of The Auxiliary Companies To The Spanish Automobile Industry, Surendra Gupta, Pilar Gonzalez-Torrea, Beatriz Gonzalez
Environmental Practices Of The Auxiliary Companies To The Spanish Automobile Industry, Surendra Gupta, Pilar Gonzalez-Torrea, Beatriz Gonzalez
Surendra M. Gupta
The automobile manufacturing industry plays a very important role in a country's economy. The importance of automobile manufacturing industry lies in its sheer size and complexity in terms of the direct and indirect influence it commands across many other industries. While millions of people are employed in the automobile manufacturing industry, it is estimated that more than two and half times that number are employed in the auxiliary companies that supply parts to the automobile manufacturing companies. The auxiliary companies represent a group of businesses of various sizes, types, and geographical locations, producing a vast variety of products ranging from …
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
Surendra M. Gupta
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.
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
Surendra M. Gupta
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 …
Goal Programming Approach To The Remanufacturing Supply-Chain Model, Surendra M. Gupta
Goal Programming Approach To The Remanufacturing Supply-Chain Model, Surendra M. Gupta
Surendra M. Gupta
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 …
Modeling Operational Behavior Of A Disassembly Line, Surendra M. Gupta
Modeling Operational Behavior Of A Disassembly Line, Surendra M. Gupta
Surendra M. Gupta
In this paper we present a dynamic kanban (pull) system specifically developed for disassembly lines. This type of kanban system is much more complex than the traditional kanban system used in assembly lines. For instance, unlike the assembly line where the external demand occurs only at the last station, the demands in the disassembly case also occur at any of the intermittent stations. The reason is that as a product moves on the disassembly line, various parts are disassembled at every station and accumulated at that station. Therefore, there are as many demand sources as there are number of parts. …
Multi-Kanban Mechanism For Personal Computer Disassembly, Surendra M. Gupta, Kamarthi V. Sagar, Udomsawat Gun
Multi-Kanban Mechanism For Personal Computer Disassembly, Surendra M. Gupta, Kamarthi V. Sagar, Udomsawat Gun
Surendra M. Gupta
The use of personal computers (PCs) continues to increase every year. According to a 1999 figure, 50 percent of all US households owned PCs, a figure that continues to rise every year. With continuous development of sophisticated software, PCs are becoming increasingly powerful. In addition, the price of a PC continues to steadily decline. Furthermore, the typical life of a PC in the workplace is approximately two to three years while in the home it is three to five years. As these PCs become obsolete, they are replaced and the old PCs are disposed of. It is estimated that between …
Second-Hand Market As An Alternative In Reverse Logistics, Surendra M. Gupta
Second-Hand Market As An Alternative In Reverse Logistics, Surendra M. Gupta
Surendra M. Gupta
Collectors of discarded products seldom know when those products were bought and why they are discarded. Also, the products do not indicate their remaining life periods. So, it is difficult to decide if it is ""sensible"" to repair (if necessary) a particular product for subsequent sale on the second-hand market or to disassemble it partially or completely for subsequent remanufacture and/or recycle. To this end, we build an expert system using Bayesian updating process and fuzzy set theory, to aid such decision-making. A numerical example demonstrates the building approach.
Balancing Inventory Generated From A Disassembly Line: Mathematical Approach, Surendra M. Gupta, Badr O. Johar
Balancing Inventory Generated From A Disassembly Line: Mathematical Approach, Surendra M. Gupta, Badr O. Johar
Surendra M. Gupta
Product recovery is a new trend that many manufacturers practice to minimize the fast depletion of virgin resources and to realize economical benefits from recovering end-of-life (EOL) products. However, the practice of recovering components and materials is challenging as it often requires disassembly. There are many distinctive complications associated with the disassembly process. One of the complications stems from the disassembly line balancing problem (DLBP). DLBP has recently been actively researched in the literature and several heuristic models have been introduced to provide near optimal work contents at each workstation of the disassembly line. However, due to the disparity between …
Optimal Ordering Policy In A Disassembly-To-Order System With Limited Supply And Quantity Discount, Surendra M. Gupta, Amre Z. Massoud
Optimal Ordering Policy In A Disassembly-To-Order System With Limited Supply And Quantity Discount, Surendra M. Gupta, Amre Z. Massoud
Surendra M. Gupta
This paper considers the disassembly-to-order (DTO) problem where a variety of returned products are disassembled in order to satisfy the demand for specified numbers of components. The main objective is to determine the optimal number of take-back end-of-life (EOL) products for the DTO system that maximizes the profit. A wide variety of products and subassemblies are considered for disassembly in order to meet the demand of the customers for the different components. Several factors are considered before disassembling any product. Some of the factors include the condition of retuned products, the different number of suppliers offering EOL products, and the …
Optimum Disassembly Sequencing, Surendra M. Gupta, A. J. D. Lambert
Optimum Disassembly Sequencing, Surendra M. Gupta, A. J. D. Lambert
Surendra M. Gupta
We consider the disassembly sequencing problem subjected to sequence dependent disassembly costs. Because most of the available methods that deal with such problems rely on metaheuristic and heuristic methods, it is desirable to have exact methods available that can at least be applied to medium sized problems to determine if the heuristically obtained solutions are acceptable or not. The conventional integer linear programming (ILP) approaches become unmanageable even for modest product complexity cases. In this paper, we propose an iterative method that repeatedly solves a binary integer linear programming (BILP) problem. The method converges quickly for medium sized problems. We …
Optimal Production Policy For A Remanufacturing System With Virtual Inventory Cost, Surendra M. Gupta, Kenichi Nakashima
Optimal Production Policy For A Remanufacturing System With Virtual Inventory Cost, Surendra M. Gupta, Kenichi Nakashima
Surendra M. Gupta
This paper deals with a cost management problem of a remanufacturing system with stochastic demand. We model the system with consideration for two types of inventories. One is the actual product inventory in the factory. The other is the virtual inventory that is being used by the customer. For this virtual inventory, it should be required to consider an operational cost that we need in order to observe and check the quantity of the inventory. We call this the virtual inventory cost and model the system by including it. We define the state of the remanufacturing system by the two …
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
Surendra M. Gupta
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.
Exploring The Impact Of Reality On Mrp Performance, Surendra M. Gupta
Exploring The Impact Of Reality On Mrp Performance, Surendra M. Gupta
Surendra M. Gupta
This paper deals with the sensitivity analysis of MRP under probablistic lead times and demands. A simulation model incorporating a MRP module is described and results obtained from multi-level product structures explored. A total of eight lot sizing rules are considered. The results produced by the simulation model deal with period by period and overall simulation run statistics. These statistics cover service level, average backorder and inventory levels, maximum and minimum backorder and inventory levels, and the number of periods backorders were experienced during the simulation run. Several studies conducted using this simulation model are described.
Use Of Flexible Kanban For Material Flow Control In A Disassembly Process, Surendra Gupta, Elif Kizilkaya
Use Of Flexible Kanban For Material Flow Control In A Disassembly Process, Surendra Gupta, Elif Kizilkaya
Surendra M. Gupta
Disassembly is one of the proposed solutions to the increased environmental problem of large-scale disposal of manufactured products. Disassembly process brings with it a lot of unresolved material control issues. In this paper we illustrate the implementation of the recently developed Flexible Kanban System to cope with the uncertainties that are unique to the disassembly system.
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
Surendra M. Gupta
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
Surendra M. Gupta
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 …
The Effect Of Sudden Server Breakdown On The Performance Of A Disassembly Line, Surendra M. Gupta, Gun Udomsawat
The Effect Of Sudden Server Breakdown On The Performance Of A Disassembly Line, Surendra M. Gupta, Gun Udomsawat
Surendra M. Gupta
Product and material recovery relies on the disassembly process to separate target components or materials from the end-of-life (EOL) products. Disassembly line is especially effective when products in large quantity are disassembled. Unlike an assembly line, a disassembly line is more complex and is subjected to numerous uncertainties including stochastic and multi-level arrivals of component demands, stochastic arrival times for EOL products, and process interruption due to equipment failure. These factors seriously impair the control mechanism in the disassembly line. A common production control mechanism is the traditional push system (TPS). TPS responds to the aforementioned complications by carrying substantial …
Multi-Criteria Decision Making Approach In Multiple Periods For A Disassembly-To-Order System Under Product's Deterioration And Stochastic Yields, Surendra Gupta, Prasit Imtanavanich
Multi-Criteria Decision Making Approach In Multiple Periods For A Disassembly-To-Order System Under Product's Deterioration And Stochastic Yields, Surendra Gupta, Prasit Imtanavanich
Surendra M. Gupta
In this paper, we concentrate on the disassembly-to-order (DTO) system, where end-of-life (EOL) products are taken back from last users to be disassembled to fulfill the demands for components and materials. The objective is to determine the number of EOL products that would be needed to maximize the profit and minimize the costs of the system. The conditions of EOL products are not always certain, which makes the problem difficult. We use a heuristic approach which transforms the stochastic disassembly yields into their deterministic equivalents and use a multi-criteria decision-making technique to solve the problem. In addition, we take the …
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
Surendra M. Gupta
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
Surendra M. Gupta
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 …