Title :
A greedy heuristic for locating crossovers in conveyor-based AMHS in wafer fabs
Author :
Johnson, Andrew ; Carlo, Hector J. ; Jimenez, Jesus A. ; Nazzal, Dima ; Lasrado, Vernet
Author_Institution :
Dept. of Ind. & Syst. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
Finding the optimal layout of Automated Material Handling Systems (AMHS) is critical for the design of next generation semiconductor wafer fabs. This paper proposes a greedy heuristic to determine the configuration of a conveyor-based AMHS featuring turntables and crossovers. Using a conveyor-based analytical model, the heuristic identifies the crossover that provides the greater benefit in terms of work-in process and delivery time reduction. The virtual SEMATECH 300 mm fab is used to demonstrate the application of the heuristic. Numerical results show that adding crossovers reduced the system´s delivery time by up to 22-percent in the scenarios under consideration.
Keywords :
conveyors; decision making; integrated circuit design; integrated circuit manufacture; semiconductor industry; automated material handling system; conveyor based AMHS; crossovers location; delivery time reduction; greedy heuristic; semiconductor wafer fabs; turntables; virtual SEMATECH 300 mm fab; Analytical models; Cost function; Delay estimation; Engineering management; Industrial engineering; Materials handling; Semiconductor device modeling; Systems engineering and theory; Throughput; Virtual manufacturing;
Conference_Titel :
Simulation Conference (WSC), Proceedings of the 2009 Winter
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-5770-0
DOI :
10.1109/WSC.2009.5429177
