Dynamic lot dispatching required turn rate factory control syste

Details Dynamic lot dispatching required turn rate factory control syste Dynamic lot dispatching required turn rate factory control syste

1996-10-18

1998-10-06

Voeltz, Emanuel Todd

Boots, shoes, and leggings

36446828, 36446802, G06F 1900

Patent

active

058187162

ABSTRACT:
In a semiconductor manufacturing fabrication plant with production to-order type operation, hundreds of devices and various processes are managed. To provide short cycle time and precise delivery to satisfy customer expectations is a major task. A dispatching algorithm named "Required Turn Rate (RTR)" functions according to the level of current wafers in process (WIP) algorithm revising the due date for every lot to satisfy the demand from Master Production Scheduling (MPS). Further the RTR algorithm calculates the RTR of each lot based on process flow to fulfill the delivery requirement. The RTR algorithm determines not only due date and production priority of each lot, but also provides RTR for local dispatching. The local dispatching systems of each working area dispatch the lots by using required turn rate to maximize output and machines utilization.

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