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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 …
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 …
Controlling Disassembly Line With Multi-Kanban System, Surendra M. Gupta, Gun Udomsawat
Controlling Disassembly Line With Multi-Kanban System, Surendra M. Gupta, Gun Udomsawat
Surendra M. Gupta
A way to implement the pull system in a disassembly line is to use a multi-kanban model. The model employs several types of kanbans attached to both components and subassemblies. The heart of the system lies in the kanban routing mechanism which allows routing of kanbans in multi-directions based on real time conditions. This mechanism creates minimum amount of residual inventory while satisfying varying demand levels. It also helps regulate the requests for subassembly from upstream workstations when a breakdown occurs at a workstation. This reduces blockage and starvation of subassemblies at workstations other than the broken workstation. In this …
Multikanban Model For Disassembly Line With Demand Fluctuation, Gun Udomsawat, Surendra M. Gupta, Yousef A. Y. Al-Turki
Multikanban Model For Disassembly Line With Demand Fluctuation, Gun Udomsawat, Surendra M. Gupta, Yousef A. Y. Al-Turki
Surendra M. Gupta
In recent years, the continuous growth in consumer waste and dwindling natural resources has seriously threatened the environment. Realizing this, several countries have passed regulations that force manufacturers not only to manufacture environmentally conscious products, but also to take back their used products from consumers so that the components and materials recovered from the products may be reused and/or recycled. Disassembly plays an important role in product recovery. A disassembly line is perhaps the most suitable setting for disassembly of products in large quantities. Because a disassembly line has a tendency to generate excessive inventory, employing a kanban system can …