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Evaluating Threshold Limits for AMHS Route Down Management in Semiconductor Manufacturing

This project aims to analyze the impact of route downtimes in the Automatic Materials Handling System (AMHS) at TECH Semiconductor Singapore. The objectives include evaluating the impact of route down occurrences, determining the threshold limits, and proposing an optimal route down schedule. By utilizing historical data and forecasting incoming Work-In-Progress (WIP), this study seeks to minimize machine utilization losses due to downtimes, ensuring efficient operations in wafer transportation and production processes.

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Evaluating Threshold Limits for AMHS Route Down Management in Semiconductor Manufacturing

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  1. Systems Design Project Determine the Threshold Limit during AMHS Route Down TECH Semiconductor Singapore Pte Ltd Department of Industrial & Systems Engineering By: Li Longzhou, Shang Ke, Xiao Hui, Zhan Haixu Supervisors: A/P Chew Ek Peng, Dr. Hung Hui-Chih 1. Project Description 2. Project Objectives Wafers are transported by Automatic Materials Handling System (AMHS) which requires route down (maintenance, etc) from time to time. Machines affected cannot get new inputs and will become idle after finishing all the wafers in buffer lots and thus suffer machine utilization loss. • Evaluate the impact of route down. • Determine threshold limit of route down. • Propose an optimal route down schedule. 3. Methodology • Use latest historical data to infer threshold • limit. • Use forecasted incoming WIP to dynamically • recommend route down schedule. 4. Route Down Impact Evaluation 5. Route Down Schedule Analysis 1st Choice Recommended Periods Zoom In Recommended Periods 2nd Choice

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