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- Production engineering (15)
- Disassembly (13)
- Recycling (Waste (etc.)) (9)
- End of life products (5)
- Kanban system (5)
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- End-of-life processing (4)
- Reverse supply chain (4)
- Disassembly-to-order (3)
- Disassembly line balancing (2)
- Manufacturing systems (2)
- Material requirements planning (MRP) (2)
- Product life cycle (2)
- Product recovery (2)
- Second-hand markets (2)
- Sensor embedded products (2)
- Strategic planning (2)
- Dynamic Kanban System for Disassembly Line (DKSDL) (1)
- multi-kanban system (MKS) (1)
- Dynamic Kanban System for Disassembly Line (DKSDL) (1)
- Modified Kanban System for Disassembly Line (MKSDL) (1)
- end-of-life (EOL) (1)
- fuzzy Analytic Hierarchy Process (AHP) (1)
- Disassembly-to-order (DTO) (1)
- Generalized stochastic petrinet (GSPN) (1)
- Advanced disassembly/repair-to-order (1)
- Automobile industry (1)
- Borda's choice rule (1)
- Building safety (1)
- Building sites--Safety measures (1)
- China (1)
Articles 1 - 30 of 37
Full-Text Articles in Engineering
A Business-Mapping Approach To Multi-Criteria Group Selection Of Collection Centers And Recovery Facilities, Kishore Pochampally, Surendra Gupta
A Business-Mapping Approach To Multi-Criteria Group Selection Of Collection Centers And Recovery Facilities, Kishore Pochampally, Surendra Gupta
Surendra M. Gupta
For a prospective reverse supply chain to operate efficiently, the designing of that chain must involve selection of collection centers and recovery facilities that have sufficient success potentials. These success potentials depend heavily on the participation (in the reverse supply chain) of three important groups that have multiple, conflicting, and incommensurate goals. Therefore, the potentials must be evaluated based on the maximized consensus among the three groups, viz., (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 …
Design Of An Integrated Component Recovery System, Pitipong Veerakamolmal, Surendra Gupta
Design Of An Integrated Component Recovery System, Pitipong Veerakamolmal, Surendra Gupta
Surendra M. Gupta
This paper presents a two-stage disassembly and retrieval system that provides a unique solution for planning selective component recovery from products. The solution approach uses a process sequencing technique to schedule the operations in both stages to optimize the operational makespan.
A Combinatorial Cost-Benefit Analysis Methodology For Designing Modular Electronic Products For The Environment, Pitipong Veerakamolmal, Surendra Gupta
A Combinatorial Cost-Benefit Analysis Methodology For Designing Modular Electronic Products For The Environment, Pitipong Veerakamolmal, Surendra Gupta
Surendra M. Gupta
This paper presents a technique to analyze the efficiency of designing electronic products for the environment. The efficiency of each design is indicated using a Design for Disassembly Index (DfDI). DfDI uses a disassembly tree (DT) which relies on the product's bill of materials as its structural blueprint. DfDI can be used to compare the efficiency among alternative designs, identifying the best alternative for a product retirement plan. In addition, the index offers designers with an important measure to help improve future products.
A Multi-Phase Mathematical Programming Approach To Strategic Planning Of An Efficient Reverse Supply Chain Network, Kishore Pochampally, Surendra Gupta
A Multi-Phase Mathematical Programming Approach To Strategic Planning Of An Efficient Reverse Supply Chain Network, Kishore Pochampally, Surendra Gupta
Surendra M. Gupta
Strategic planning of a supply chain 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 most economical used products must be reprocessed in only the recovery facilities that have the potential to efficiently reprocess them. Due to uncertainties in supply, quality and reprocessing times of used-products, the cost-benefit function in the literature that selects the most economical product to reprocess from a set of used-products is not appropriate for direct adoption. Moreover, due to the same uncertainties, any traditional forward supply chain approach to …
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 …
System Dynamics Approach In Inventory Management Of End-Of-Life Products In A Disassembly Line, Badr Johar, Surendra Gupta
System Dynamics Approach In Inventory Management Of End-Of-Life Products In A Disassembly Line, Badr Johar, Surendra Gupta
Surendra M. Gupta
A major challenge original equipment manufacturers (OEMs) currently face is how to implement an effective reverse supply chain network that is both cost effective and efficient. The rapid increase in the end-of-life (EOL) products returns from end customers back to origin for recovery or proper disposal can be said one of the main reasons behind this interest. Thus, the purpose of this paper is to examine the relationship between all elements of inventory management in the disassembly context using the system dynamic modeling approach to analyze the inventory of disassembled parts. Analysis of different market scenarios is conducted. The system …
Dynamic Programming For Solving Disassembly-To-Order System Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Massoud, Surendra Gupta
Dynamic Programming For Solving Disassembly-To-Order System Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Massoud, Surendra Gupta
Surendra M. Gupta
In this paper, we consider the disassembly-to-order (DTO) problem where a variety of returned end-of-life (EOL) products are disassembled in order to satisfy the demand for specified numbers of components. However, a lot of uncertainties exist in the disassembly process that further complicates the process. A DTO model has been developed that takes into consideration the different system uncertainties and variability. The DTO model was solved in multiple periods using dynamic programming (DP). The main objective was to determine optimal number of takeback EOL products in every period from each supplier to fulfill the demand of components while maximizing total …
An Evaluation Of The Effect Of Sensor Embedded Products In Product Disassembly With Precedence Relationships, Mehmet Ilgin, Surendra Gupta
An Evaluation Of The Effect Of Sensor Embedded Products In Product Disassembly With Precedence Relationships, Mehmet Ilgin, Surendra Gupta
Surendra M. Gupta
A promising solution approach to deal with the uncertainty associated with disassembly yield is sensor embedded products (SEPs) which involve sensors implanted during the production process. This study presents a quantitative assessment of the impact of SEPs on the various performance measures of a kanban-controlled air conditioner disassembly line. First, separate design of experiments studies based on orthogonal arrays are carried out for the cases with and without SEPs. Then, the results of paired-t tests comparing two cases based on different performance measures are presented.
Linear Physical Programming For Solving The Multi-Criteria Disassembly-To-Order Problem Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Massoud, Surendra Gupta
Linear Physical Programming For Solving The Multi-Criteria Disassembly-To-Order Problem Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Massoud, Surendra Gupta
Surendra M. Gupta
This paper focuses on the disassembly-to-order (DTO) problem. End-of-life (EOL) products are purchased from a number of suppliers in order to be disassembled into individual components to satisfy the demand for specified numbers of components. However, there are a lot of uncertainties that complicates the process. Previous work in the literature solved the DTO problem under multiple uncertainties and a single objective. Other models solved the multicriteria DTO problem with a single uncertainty. This paper develops a multi-criteria DTO model that takes into consideration multiple system uncertainties and solves it using Linear Physical Programming (LPP). The main objective was to …
An Optimization Framework For Advanced Disassembly/Repair-To-Order Systems With Remaining-Life Adjustment, Onder Ondemir, Surendra Gupta
An Optimization Framework For Advanced Disassembly/Repair-To-Order Systems With Remaining-Life Adjustment, Onder Ondemir, Surendra Gupta
Surendra M. Gupta
Due to environmental awareness and realization of cost savings, disassembly-to-order (DTO) concept has become popular. One of the main obstacles to making optimal DTO decisions is the uncertainty involved in end-of-life products (EOLPs). This uncertainty is due to the lack of information about the condition and the quantity of EOLPs returned. This uncertainty is removed by advanced disassembly/repair-to-order systems utilizing sensors to monitor the products in their life-cycle. Sensor technology enables remaining life estimation, thus allows advanced DTO models to deal with sophisticated component and product demands with remaining life adjustment. This paper presents an optimization framework for advanced disassembly/repair-to-order …
Cost-Benefit Analysis Of Sensor-Embedded Products Based Disassembly-To-Order System, Onder Ondemir, Surendra Gupta
Cost-Benefit Analysis Of Sensor-Embedded Products Based Disassembly-To-Order System, Onder Ondemir, Surendra Gupta
Surendra M. Gupta
Due to environmental awareness and realization of cost savings, disassembly-to-order (DTO) concept has become popular. One of the main obstacles to making optimal DTO decisions is the uncertainty involved in end-of-life products (EOLPs). This uncertainty is due to the lack of information about the condition and the quantity of EOLPs returned. This uncertainty can be removed by sensors monitoring the products in their life-cycle. However, DTO systems utilizing these sensors will be more costly to establish and maintain. This paper presents economic justification of establishing advanced disassembly-to-order (DTO) systems in which sensor-embedded end-of-life products are disassembled in order to fulfill …
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 …
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.
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 …
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 …
Disassembly Sequence Planning For Complete Disassembly In Product Recovery, Askiner Gungor, Surendra Gupta
Disassembly Sequence Planning For Complete Disassembly In Product Recovery, Askiner Gungor, Surendra Gupta
Surendra M. Gupta
Disassembly is a key element for retrieving the desired subassemblies and/or parts from a product. However, determining an efficient disassembly sequence plan (DSP) is an NP-complete problem. In this paper, we propose a methodology to generate a near optimum DSP for a product. The methodology is illustrated using an example.
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 …
A Modified Kanban System For Disassembly, Surendra Gupta, Elif Kizilkaya
A Modified Kanban System For Disassembly, Surendra Gupta, Elif Kizilkaya
Surendra M. Gupta
We present a new Kanban system specifically developed for material control and scheduling in a disassembly environment. We briefly highlight the differences between the new (modified) and the traditional Kanban system. We assert that in the disassembly environment, the Kanban system is superior to the push system currently practiced in industry. To that end, we consider a case example and test its performance by experimenting with several different scenarios. In all instances, the Kanban system outperforms the push system.
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.
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 …
Analysis Of A Just-In-Time Production System With Supplier Kanbans, Surendra Gupta, Kenichi Nakashima
Analysis Of A Just-In-Time Production System With Supplier Kanbans, Surendra Gupta, Kenichi Nakashima
Surendra M. Gupta
In this paper, we introduce a generalized stochastic Petri net (GSPN) to model a single-process, single-product, Just- In-Time (JIT) manufacturing facility with a supplier kanban system for multiple vendors. Its properties are investigated and the effects of the vendors' activities on the system are discussed using ANOVA.
Computational Complexity Of A Reverse Manufacturing Line, Surendra Gupta, Seamus Mcgovern
Computational Complexity Of A Reverse Manufacturing Line, Surendra Gupta, Seamus Mcgovern
Surendra M. Gupta
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 …
Multi-Kanban Mechanism For Appliance Disassembly, Surendra Gupta, Gun Udomsawat
Multi-Kanban Mechanism For Appliance Disassembly, Surendra Gupta, Gun Udomsawat
Surendra M. Gupta
The use of household appliances continues to rise every year. A significant number of End-Of-Life (EOL) appliances are generated because of the introduction of newer models that are more attractive, efficient and affordable. Others are, of course, generated when they become non-functional. Many regulations encourage recycling of EOL appliances to reduce the amount of waste sent to landfills. In addition, EOL appliances offer the appliance manufacturing and remanufacturing industries a source of less expensive raw materials and components. For this reason product recovery has become a subject of interest during the past decade. In this paper, we study the disassembly …
Economics Of Pc Recycling, Jacqueline Isaacs, Surendra Gupta, Boon Jane
Economics Of Pc Recycling, Jacqueline Isaacs, Surendra Gupta, Boon Jane
Surendra M. Gupta
As the use of personal computers (PCs) increases, their short life cycle and the fact that they contain many hazardous materials means that their retirement and disposal represents a significant environmental concern. Many communities are mandating the recycling of these PCs, to recover parts and materials, and to minimize the amount of waste landfilled or incinerated. An industry to recycle these PCs is evolving to take advantage of this stream of materials. At present, PC recycling is not profitable. This paper investigates the factors that most influence the net cost to recycle PCs so that PC manufacturers, recyclers and legislators …
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 …
Sudden Material Handling System Breakdown In A Disassembly Line, Surendra Gupta, Elif Kizilkaya
Sudden Material Handling System Breakdown In A Disassembly Line, Surendra Gupta, Elif Kizilkaya
Surendra M. Gupta
In this paper we study the effect of the sudden breakdown of material handling equipment on the performance of recently introduced MKSD (Modified Kanban System for Disassembly). We also study behavior of a newly developed JIT system for disassembly called DKSDL (Dynamic Kanban System for Disassembly Line) under the same conditions. DKSDL dynamically adjusts the number of disassembly production kanbans in or der to offset blocking and starvation caused by these factors during a disassembly cycle. We compare the overall performances of the MKSD and the DKSDL models under different scenarios. The scenario settings, approach to the solution, results and …
A Structured Analysis Of Mrp Systems Under Supply Uncertainty, Surendra Gupta, Louis Brennan
A Structured Analysis Of Mrp Systems Under Supply Uncertainty, Surendra Gupta, Louis Brennan
Surendra M. Gupta
One of the major issues affecting the real life performace of MRP is the existence of uncertainties in the maufacturing environment. Lead time uncertainties arising from supplier behavior and process unpredictability are examples of such phenomena. This paper presents an analysis of the operation of MRP systems in the presence of supply and process uncertainties. A simulation model is employed to explore the influence of such uncertainties and their interaction with other factors. The shape of the product structure and the lot-sizing technique used are found to significantly impact performace in the presence of supply uncertainties.
Pricing End-Of-Life Components, Surendra Gupta, Srikanth Vadde, Sagar Kamarthi
Pricing End-Of-Life Components, Surendra Gupta, Srikanth Vadde, Sagar Kamarthi
Surendra M. Gupta
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 …
A Fuzzy Ahp-Based Approach For Selecting Potential Recovery Facilities In A Closed Loop Supply Chain, Surendra Gupta, Satish Nukala
A Fuzzy Ahp-Based Approach For Selecting Potential Recovery Facilities In A Closed Loop Supply Chain, Surendra Gupta, Satish Nukala
Surendra M. Gupta
In this paper, we employ fuzzy AHP methodology for selecting potential recovery facilities in a closed-loop supply chain. This methodology utilizes triangular fuzzy numbers for pair-wise comparisons and the extent analysis method for the synthetic extent value of the fuzzy pair-wise comparisons and principle of comparison of fuzzy numbers to derive the weight vectors to address the criticism traditional AHP often faces due to its unbalanced scale of judgments and inability to handle inherent uncertainty in carrying out pair-wise comparisons. A numerical example is considered to illustrate the methodology.
Graduate Education In The People's Republic Of China, Surendra Gupta
Graduate Education In The People's Republic Of China, Surendra Gupta
Surendra M. Gupta
This paper briefly describes the resumption and development of graduate education in China and addresses the rapidly changing situation in higher education. The author represents the first of less than a dozen professors who have been invited by the Chinese Government (during 1984-1986) to establish and develop a unique degree program called the Master of Information Engineering which represents a synthesis of Quantitative areas of Business Studies, Management Information Systems, Management Science and Computer Science. Our mission is to transfer the technology involved in a two-year graduate degree program so as to devleop a unique symphony of courses and also …