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Full-Text Articles in Engineering
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.
Designing Electronic Products For Disassembly Using Cost/Benefit Analysis, Surendra M. Gupta, Pitipong Veerakamolmal
Designing Electronic Products For Disassembly Using Cost/Benefit Analysis, Surendra M. Gupta, Pitipong Veerakamolmal
Surendra M. Gupta
This paper presents a technique to analyze the design efficiency of a product at both ends of the life-cycle. The design efficiency is measured using a Design for Disassembly Index (DfDI). DfDI uses a disassembly tree (DT) which relies on the structural blueprint of a product. The DT can be used to identify precedent relationships that define the structural constraints in terms of the order in which components can be retrieved. DfDI can be used to compare the merits and drawbacks of different product designs. The index offers designers with an important measure to help improve future products. We provide …
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 …
Coping With Processing Time Variation In A Jit Environment, Surendra M. Gupta, Yousef A. Y. Al-Turki, Ronald F. Perry
Coping With Processing Time Variation In A Jit Environment, Surendra M. Gupta, Yousef A. Y. Al-Turki, Ronald F. Perry
Surendra M. Gupta
It is well known that the performance of the JIT production system is optimum in a deterministic environment. However, real-world situations contain uncertainties in processing times, with which traditional JIT does not deal well. In this paper, we present a newly developed Kanban system that systematically manipulates the number of Kanbans to cope with the discrepancies introduced by the uncertainty in processing times. We illustrate that the performance of this new system is superior to the traditional JIT system in such an environment.
Disposal Decisions Under Predetermined Pricing Policies, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Disposal Decisions Under Predetermined Pricing Policies, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi
Surendra M. Gupta
The economic progress of product recovery facilities (PRFs) is often bogged down by the inventory imbalances arising from the hard-to-predict arrival rates of discarded products and the stochastic demand trends for the recovered components. In spite of adopting an effective pricing policy a strategy to minimize inventory fluctuations , the inventory levels may skyrocket when there is an unexpected surge in the quantity of discarded products. Under this scenario PRFs have two options: either to dispose the surplus items or to stock them in anticipation of the future demand. This paper is concerned with PRFs optimal disposal decisions when the …
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.
Sensor-Embedded Computers For Better Life-Cycle Management, Sagar V. Kamarthi, Surendra M. Gupta, Zeid Ibrahim, Vadde Srikanth
Sensor-Embedded Computers For Better Life-Cycle Management, Sagar V. Kamarthi, Surendra M. Gupta, Zeid Ibrahim, Vadde Srikanth
Surendra M. Gupta
This research investigates the advantages offered by embedded sensors for cost-effective and environmentally benign product life cycle management for desktop computers. During their use by customers as well as at the end of their lives, Sensor Embedded Computers (SECs) by virtue of sensors embedded in them generate data and information pertaining to the conditions and remaining lives of important components such as hard-drive, motherboard, and power supply unit. A computer monitoring framework is proposed to provide more customer comfort, reduce repair costs and increase the effectiveness of current disassembly practices. The framework consists of SECs, remote monitoring center (RMC), repair/service, …
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 …
Solving A Disassembly-To-Order System By Using Genetic Algorithm And Weighted Fuzzy Goal Programming, Surendra M. Gupta, Prasit Imtanavanich
Solving A Disassembly-To-Order System By Using Genetic Algorithm And Weighted Fuzzy Goal Programming, Surendra M. Gupta, Prasit Imtanavanich
Surendra M. Gupta
In this paper, Genetic Algorithm (GA) is used to solve the 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. The main objective is to determine the optimal number of take-back EOL (end-of-life) products for the DTO system which satisfy the desirable criteria of the system. We implement the Weighted Fuzzy Goal Programming (WFGP) to calculate the fitness values in GA process. We also consider product deterioration which affects the yield rates (e.g., older products tend to have lower yield rates for usable …
Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta
Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta
Surendra M. Gupta
In this paper, we discuss a new problem, the disassembly line balancing problem (DLBP), which can simply be defined as the optimum assignment of disassembly tasks to the disassembly workstations under the condition that the precedence relationships among the tasks are not violated. The objectives are to meet the demand and to utilize the disassembly line as efficiently as possible. We present a systematic approach to solve a simple DLBP. An example is also presented to illustrate the approach.
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 …
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.
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.
A Neural Network Approach To Predict The Success Of A Collection Center In A Reverse Supply Chain, Surendra M. Gupta, Kishore K. Pochampally
A Neural Network Approach To Predict The Success Of A Collection Center In A Reverse Supply Chain, Surendra M. Gupta, Kishore K. Pochampally
Surendra M. Gupta
We propose a neural network approach to evaluate the success potential of a collection center of interest that is being considered for inclusion in a reverse supply chain, using the available linguistic data of collection centers that already exist in the reverse supply chain. The approach is carried out in four phases, as follows. In phase I, we identify the criteria for evaluating the collection center of interest, by each group participating in the reverse supply chain, viz. consumers, governments and executives. Then, in phase II, we use fuzzy ratings of already existing collection centers to construct a neural network …
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 …
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.
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 …
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.
Dynamic Group Maintenance Policy In A Smart Sensor Integrated Flow-Line Manufacturing System, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi, Cheng Cui
Dynamic Group Maintenance Policy In A Smart Sensor Integrated Flow-Line Manufacturing System, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi, Cheng Cui
Surendra M. Gupta
Machine-tool breakdowns, both expected and unexpected, make it difficult to devise effective maintenance plans that do not adversely affect the performance of a manufacturing system. This work presents a heuristic maintenance grouping algorithm which takes the machine-tool failure information provided by smart sensors into account to come up with condition-based preventive maintenance plans that does not severely affect the manufacturing system operations. Studies on the simulation model of a flow-line manufacturing system integrated with smart sensors indicate that grouping of maintenance actions increases the uptime efficiency, boosts the production rate, reduces the maintenance cost, and decreases the production loss.
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 …
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 …
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 …