TRIP-BASED MATERIAL HANDLING SYSTEMS: THROUGHPUT CAPACITY ANALYSIS

Determining Transfer Batch Sizes in Trip-Based Material Handling Systems

Trip-based material handling systems such as AGV systems or lift trucks are often designed with a given flow matrix (or from-to chart), which typically shows the number of loaded trips that the devices must perform per unit time between the workstations. A from-to chart that would result from the parts flow in a facility actually is dictated by the transfer batch size; that is, the number of pa...

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 ...

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...

Performance, reliability, and performability of material handling systems

A number of di€ erent performance measures have been used in the design and analysis of material handling systems. These performance measures have measured either: (1) the entire manufacturing system (e.g. job throughput), or (2) the material handling system independently (e.g. vehicle travel distance). The following is a review of performance, reliability, and performabilitymeasures used in th...