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Full-Text Articles in Engineering
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.
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 …
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due to an ever-increasing number of consumer goods manufactured has led to an increase in the quantity of used and outdated products discarded.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 …
Optimizing The Supply Chain In Reverse Logistics, Surendra M. Gupta
Optimizing The Supply Chain In Reverse Logistics, Surendra M. Gupta
Surendra M. Gupta
Supply chain planning systems in reverse logistics present the industry with new problems that demand new approaches. The specific problem of the reverse logistics for the end-of-life (EOL) products addressed in this study is to determine the number of products to disassemble in a given time period to fulfill the demand of various components during that and subsequent time periods. We present a mathematical programming based model to solve the problem. When the problem is solved, it gives the number and timing of each product type to be disassembled in order to fulfill the demand of components needed at minimal …
Mechanism For Coordination Between The Collector And The Dismantler In A Reverse Supply Chain, Surendra M. Gupta, Kishore K. Pochampally
Mechanism For Coordination Between The Collector And The Dismantler In A Reverse Supply Chain, Surendra M. Gupta, Kishore K. Pochampally
Surendra M. Gupta
The growing desire of consumers to acquire the latest technology (both at home and in the workplace), along with the rapid technological development of new products, has led to a new environmental problem: waste. The only way to tackle this problem is design and implementation of reverse supply chains. Implementation of an efficient reverse supply chain requires coordination among a number of parties, such as the collector, the dismantler, the shredder, and the recycler. In this paper, we identify four different scenarios of homogeneous and heterogeneous products, and formulate some potential interactions between the collector and the dismantler, for each …
Remanufacturing Control In Multistage Systems With Stochastic Recovery Rates, Surendra M. Gupta
Remanufacturing Control In Multistage Systems With Stochastic Recovery Rates, Surendra M. Gupta
Surendra M. Gupta
Remanufacturing operations are involved with highly uncertain recovery rate of used products, subassemblies and parts that complicate the planning and control of the process. In this paper, we develop a comprehensive procedure that determines the optimal input quantities at each stage of the remanufacturing operations in which recovery rates at each stage of the process are stochastic. We model the remanufacturing system as an open queueing network and use the decomposition principle and expansion methodology to analyze it. Each station in the system is subject to breakdown and has a finite buffer capacity. Repair times, breakdown times and service times …