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A Multi-Kanban Model For Disassembly, Surendra Gupta, Gun Udomsawat, Sagar Kamarthi
A Multi-Kanban Model For Disassembly, Surendra Gupta, Gun Udomsawat, Sagar Kamarthi
Surendra M. Gupta
In this paper we demonstrate how kanbans can be used in a disassembly line setting. Disassembly line is quite different from assembly line in terms of material movement, demand arrival and inventory level fluctuation. We discuss these differences and introduce the concept of a multi-kanban mechanism to cope with them. With the help of a simulation model (developed using the ARENA software), we show that the modified kanban mechanism is in fact an effective tool for a disassembly line setting. An example is presented to illustrate the concept.
A Multi-Criteria Approach For Remanufacturing Model In A Disassembly-To-Order System, Surendra M. Gupta, Elif Kongar
A Multi-Criteria Approach For Remanufacturing Model In A Disassembly-To-Order System, Surendra M. Gupta, Elif Kongar
Surendra M. Gupta
We present a disassembly-to-order system applied in a multi-period environment where the products are taken back from the last user and/or collectors, disassembled for the retrieval of reusable items and resold (or used) in order to meet a certain level of demand for components or subassemblies. The surplus items are recycled, stored for use in subsequent periods or properly disposed of while the surplus products are only stored for subsequent periods or disposed of. We assume that the items have finite shelf lives after which they must be disposed of. Another assumption has to do with space limitation. Thus, it …
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 …
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 …
Calculating Disassembly Yields In A Multi-Criteria Decision Making Environment For A Disassembly To Order System, Surendra Gupta, Prasit Imtanavanich
Calculating Disassembly Yields In A Multi-Criteria Decision Making Environment For A Disassembly To Order System, Surendra Gupta, Prasit Imtanavanich
Surendra M. Gupta
In this paper, we consider the disassembly-to-order (DTO) problem, where a variety of returned products are disassembled to fulfill the demand for specified numbers of components and materials. The objective is to determine the optimal numbers of returned products to disassemble so as to maximize profit and minimize costs. We model the DTO problem using a multi-criteria decision making approach. Since the condition of returned products are unknown, the yields from disassembly are considered to be stochastic. To solve the stochastic problem, we use one of two heuristic approaches (viz., one-to-one approach or one-to-many approach) that convert the problem into …
Identification Of Potential Recovery Facilities For Strategic Planning Of An Efficient Reverse Distribution Network, Surendra M. Gupta, Kishore K. Pochampally, Sagar V. Kamarthi
Identification Of Potential Recovery Facilities For Strategic Planning Of An Efficient Reverse Distribution Network, Surendra M. Gupta, Kishore K. Pochampally, Sagar V. Kamarthi
Surendra M. Gupta
Strategic planning of a distribution network is one of the most challenging aspects of reverse logistics. To effectively satisfy drivers such as profitability, environmental regulations and asset recovery, only the recovery facilities that have the potential to efficiently reprocess used-products must be considered in the reverse distribution network design. Due to uncertainties in supply, quality and reprocessing times of usedproducts, traditional forward logistics approaches to identify potential manufacturing facilities are not appropriate for direct adoption in reverse logistics. This paper proposes a mathematical programming approach, taking the above uncertainties into account, to effectively select potential facilities from a set of …
Green Logistics In Closed Loop Supply Chain Networks, Surendra M. Gupta, Karine Tadevosyan, Sagar V. Kamarthi
Green Logistics In Closed Loop Supply Chain Networks, Surendra M. Gupta, Karine Tadevosyan, Sagar V. Kamarthi
Surendra M. Gupta
This paper presents the effect of parameters such as demand, acquisition and sale prices of second-hand market options in reverse logistics. We analyze the secondhand market by building an integer-programming model and applying multiple degree parametric analysis to find out the critical parameters for such a reverse logistics alternative.
Decision-Making Regarding The Futurity Of An End-Of-Use Product, Surendra M. Gupta, Kishore K. Pochampally
Decision-Making Regarding The Futurity Of An End-Of-Use Product, Surendra M. Gupta, Kishore K. Pochampally
Surendra M. Gupta
We believe that for some end-of-use products, it might make more sense to make necessary repairs to the products and sell them on second-hand markets than to disassemble them for subsequent re-processing (remanufacturing and/or recycling). To this end, we propose an approach that uses Bayesian updating process and fuzzy set theory, to decide if it is sensible to repair an improperly functioning end-of-use product of interest for subsequent sale on a second-hand market. Furthermore, we employ the fuzzy Quality Function Deployment (QFD) process as well as the method of total preferences, to select the most potential market to sell the …
Performance Evaluation Of A Product Recovery System, Surendra M. Gupta, Kenichi Nakashima
Performance Evaluation Of A Product Recovery System, Surendra M. Gupta, Kenichi Nakashima
Surendra M. Gupta
We present a Markov model to evaluate a product recovery system with stochastic variability stemming from customer demand, recovery rate and disposal rate. The model is composed of the states that denote the number of products in inventory, the transition probabilities between states and the costs associated with the transitions. Using this model, we can calculate the total expected cost per period. An example is considered to illustrate the implementation of the methodology.
Algorithms For Disassembly Scheduling, Surendra M. Gupta, Karim N. Taleb
Algorithms For Disassembly Scheduling, Surendra M. Gupta, Karim N. Taleb
Surendra M. Gupta
This paper presents the basic structure for two disassembly scheduling algorithms applied to a single product structure. The first algorithm addresses the case when all items in the product are unique. The second algorithm accounts for common items.
Using Simulation Optimization For Parts Recovery And Spare Parts Inventory Management In Post Product Life Cycle, Surendra M. Gupta, Mehmet A. Ilgin
Using Simulation Optimization For Parts Recovery And Spare Parts Inventory Management In Post Product Life Cycle, Surendra M. Gupta, Mehmet A. Ilgin
Surendra M. Gupta
The parts recovered from discarded and end-of-life products can be used as a source of spare parts during post product life cycle. However, accurate determination of the final order quantity is complicated as it requires the prediction of spare parts demand for the post product life cycle. In this paper, the spare parts problem is solved using simulation. Simulation is chosen because of the stochastic and complex nature of the problem. A simulation model of the manufacturing system is first developed which is then integrated with a genetic algorithm to determine the optimal final order quantities for a number of …
A Taguchi Loss Approach To Selection Of Collection Centers For Reverse Supply Chain Design, Surendra M. Gupta, Kishore K. Pochampally
A Taguchi Loss Approach To Selection Of Collection Centers For Reverse Supply Chain Design, Surendra M. Gupta, Kishore K. Pochampally
Surendra M. Gupta
Many a supply chain today is involved in reprocessing of used products, which requires a series of activities that are performed by multiple parties, viz., collection centers, recovery facilities, etc. Such a supply chain is called reverse supply chain. In this paper, we propose a three-phase approach for the selection of efficient collection centers in a region where a reverse supply chain is to be designed. The first phase identifies the selection criteria, the second phase uses the eigen vector method to give relative weights to the selection criteria, and the third phase uses the Taguchi loss function to select …
Inventory Balancing Of Post-Usage Components Of A Disassembly Line, Surendra M. Gupta, Badr O. Johar
Inventory Balancing Of Post-Usage Components Of A Disassembly Line, Surendra M. Gupta, Badr O. Johar
Surendra M. Gupta
In recent years, disassembly has gained a lot of attention due to its role in efficiently recovering valuable materials, parts, and subassemblies from end of life (EOL) products. This is due to the rigid environmental legislation, the economical and environmental benefits from reusing primary materials instead of virgin resources and the increase in environmental awareness and concerns of the consumers. However, the practice of recovering components and materials is challenging, as there are many associated complications that are unique to the disassembly process such as monitoring and controlling the inventory of core products and disassembled parts and the ability to …
Multi-Criteria Ant System And Genetic Algorithm For End-Of-Life Decision Making, Surendra Gupta, Seamus Mcgovern
Multi-Criteria Ant System And Genetic Algorithm For End-Of-Life Decision Making, Surendra Gupta, Seamus 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, 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 …
Simulation Based Approach For Return Packaging Systems, Surendra M. Gupta, Lerpong Jarupan, Sagar V. Kamarthi
Simulation Based Approach For Return Packaging Systems, Surendra M. Gupta, Lerpong Jarupan, Sagar V. Kamarthi
Surendra M. Gupta
In this paper, we investigate the effect of different dispatching rules and the vehicle assignment schemes applied to a returnable packaging system in order to provide superior customer satisfaction. The investigation is conducted by a simulation approach, using a commercial software ARENA. The simulation results show that different combinations of dispatching rules and the vehicle assignment schemes affect the customer satisfaction levels differently.
Selection Of Collection Centers For Reverse Logistic Networks, Onder Ondemir, Surendra M. Gupta
Selection Of Collection Centers For Reverse Logistic Networks, Onder Ondemir, Surendra M. Gupta
Surendra M. Gupta
In this paper, we address the problem of locating collection centers for a company that collects used products from product holders. Each product holder has an inherent willingness to return the product, and makes the decision on the basis of financial incentive offered by the company. We present a mixed-integer nonlinear facility location-allocation model to find the optimal locations, the optimal incentive values for different product types and the optimal vehicle type. Because the problem is NP-complete, a heuristic method is proposed to solve medium and largesize instances. We experiment with location dependent transportation costs which reflect the road conditions …
A Supply Chain Optimization Approach For Reverse Logistics Of End-Of-Life Products, Surendra M. Gupta, Yung-Joon Lee, Pitipong Veerakamolmal
A Supply Chain Optimization Approach For Reverse Logistics Of End-Of-Life Products, Surendra M. Gupta, Yung-Joon Lee, Pitipong Veerakamolmal
Surendra M. Gupta
In this paper, the main focus is on an optimization approach to determine the supply of a variety of products to recover (at the end of their lives) in order to fulfill the demand of an assortment of components, and have an environmentally benign policy of minimizing waste generation. When the problem is solved, it gives the number of each product type to be disassembled in order to fulfill the demand of components needed at minimal cost. From the supply chain perspective, this would result in minimal inventory requirements at both ends of the reverse logistics chain, viz., at the …
An Analytical Model For Remanufacturing Systems, Surendra M. Gupta, Hasan K. Aksoy
An Analytical Model For Remanufacturing Systems, Surendra M. Gupta, Hasan K. Aksoy
Surendra M. Gupta
In this paper, we introduce an open queueing network with finite buffers to model a remanufacturing system. The system consists of three modules, viz., a testing module for returned products, a disposition module for non-reusable returns and a remanufacturing module. We analyze the network using the decomposition principle and the expansion methodology. The model has been shown to be very rigorous and remarkably accurate. An example is presented to illustrate the use of the model.
Effect Of Reusable Rate Variation On The Optimal Buffer Allocation For Remanufacturing Systems, Surendra M. Gupta, Hasan K. Aksoy
Effect Of Reusable Rate Variation On The Optimal Buffer Allocation For Remanufacturing Systems, Surendra M. Gupta, Hasan K. Aksoy
Surendra M. Gupta
We investigate the effect of reusable rate variation of cores (used products) on the performance of buffer allocation plan for remanufacturing systems. We model the remanufacturing system as an open queueing network and use the decomposition principle and expansion methodology to analyze it.
Supplier Selection In A Closed-Loop Supply Chain Network, Surendra M. Gupta, Satish Nukala
Supplier Selection In A Closed-Loop Supply Chain Network, Surendra M. Gupta, Satish Nukala
Surendra M. Gupta
The growing interest in reverse logistics has many reasons, of which, consumers and governments concerns for environment being the primary reason. The growing desire of customers to acquire the latest technology, along with the rapid technological development in every industry, has led to a new environmental problem: waste, consisting of both end-of-life products and used products (products that are discarded prematurely). Increased consumption results in increased use of raw material and energy, thereby depleting the finite natural resources of the world. This environmental degradation is not sustainable by the eco-system of the earth. This environmental issue, in addition to government …
Determination Of Base Kanban Level For Multi-Kanban Mechanism In A Disassembly Line, Surendra Gupta, Gun Udomsawat
Determination Of Base Kanban Level For Multi-Kanban Mechanism In A Disassembly Line, Surendra Gupta, Gun Udomsawat
Surendra M. Gupta
In this paper, we propose an application of a pull type production control mechanism for a disassembly line setting. We discuss complications and justify the use of pull type mechanism in a disassembly line. We introduce a multikanban mechanism for a multi-product disassembly line where demand for components can arrive at any level. We define the kanban routing rules to minimize the inventory of a system while maintaining a customer service level comparable to a push system. We suggest a method of determining the proper number of base kanbans and demonstrate its effectiveness by using a simulation model and implementing …
A Single Stage Kanban Control System With Static Routing, Surendra Gupta, Aybek Korugan
A Single Stage Kanban Control System With Static Routing, Surendra Gupta, Aybek Korugan
Surendra M. Gupta
We consider a system with two discrete production lines where the output of each one can fulfill the demand for the same type of product. An example to this case is the hybrid-manufacturing environment, where a company manufactures new products and remanufactures returned products to meet the demand. The interarrival times for demand occurrences and service completions are exponentially distributed i.i.d. variables. Here, a single stage pull production control with two types of kanbans is utilized to model the system where a kanban type is dedicated for either manufacturing or remanufacturing process.
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
Surendra M. Gupta
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 …
An Inventory Control Model For Product Returns, Surendra M. Gupta, Badr O. Johar
An Inventory Control Model For Product Returns, Surendra M. Gupta, Badr O. Johar
Surendra M. Gupta
In recent years, the sales of consumer electronics have increased rapidly. Manufacturers introduce the state of the art technologies in quick succession. As a result, the volume of the returned end-of-life (EOL) products has grown significantly. Often these EOL products are still in excellent working conditions (functional). Customers return them because various marketing programs create an aura of must have sense in the minds of customers or because of the favorable incentives offered by service providers or manufacturers to acquire upgraded products. Thus, disassembly facilities are often faced with an overwhelming number of returns that is beyond the actual demand …
Optimal Ordering Policy For Product Acquisition In A Remanufacturing System, Surendra M. Gupta, Kenichi Nakashim
Optimal Ordering Policy For Product Acquisition In A Remanufacturing System, Surendra M. Gupta, Kenichi Nakashim
Surendra M. Gupta
This paper deals with the product acquisition problem and considers returned product quality. The system includes the flow of the product returns from customers to the factory as well as the forward flow of the sales. We formulate the acquisition problem together with product quality and stochastic demand using the Markov decision process. A numerical example is considered to show the implementation of the methodology.
Generating A Disassembly-To-Order Plan, Surendra M. Gupta, Prasit Imtanavanich
Generating A Disassembly-To-Order Plan, Surendra M. Gupta, Prasit Imtanavanich
Surendra M. Gupta
The main objective of this research is to effectively solve a disassembly-to-order (DTO) problem. DTO is a system where a variety of returned products are disassembled to fulfill the demand for specified numbers of components and materials. Therefore, the optimal DTO plan must be generated in order to satisfy all demands, as well as to maximize profit and minimize costs of the system. Techniques implemented to solve the problem are Genetic Algorithm (GA), Linear Physical Programming (LPP) and refining algorithm. In this paper, we describe how GA and LPP techniques together with a refining algorithm can be combined to solve …