Throughput analysis in an automated material handling system

Holonic-based Control System for Automated Material Handling Systems

In real-word manufacturing environments, finding the right job sequences and their associated schedules when resource, precedence, and timing constraints are imposed is a difficult task. For most practical problems classical scheduling easily leads to an exponential growth in the number of possible schedules. Moreover, a decision time period of hours or even minutes is too long. Good solutions ...

Data-based Node Penalties in a Path-finding Algorithm in an Automated Material Handling System

Increasing factory throughput is a critical issue in the semiconductor industry, and a quick transition of material to the next location in the automation system plays a significant role in increasing throughput. A dynamic pathfinding algorithm for a vehicle-based automated material handling system (AMHS) is discussed in this paper. The dynamic path-finding algorithm uses distance between nodes...

Performance evaluation of an automated material handling system for a wafer fab

Discrete-event simulation model was developed to evaluate the performance of an automated material handling system (AMHS) for a wafer fab with a zone control scheme avoiding all vehicle collision. The layout of this AMHS is a custom configuration. The track option contains turntables, turnouts and high-speed express lanes. The behavior of the interarrival for all stockers from the real data set...

Track layout accommodating dynamic routing in automated material handling systems

Buffer Management for Automated Material Handling Systems in Semiconductor Industries

The automated material handling system (AMHS) is a highly automated transport solution of actual 300mm semiconductor waferfabs. The big logistic challenge in such a running system is the just-in-time delivery of lots (carriers). Therefore, beside tracks and vehicles, there are different storages (stocker) and buffers (under track storages and load ports) integrated in such a transport system. T...