Cycle time reduction in batch processing by upstream rescheduling
Conference Paper
Overview
Additional Document Info
View All
Overview
abstract
Dynamic control policies utilize the expected future arrival times of the products and find a batching policy that minimizes typical performance measures such as waiting time of products in the queue. In this paper, the focus is on the batching control of semiconductor manufacturing with multiple product types. The production unit of interest consists of a serial process followed by a batch process where departures from the former become future arrivals to the latter. The scheduling decisions of the serial process are incorporated with the batch process scheduling. This setting allows the selection of the next arriving product type out of available types in the serial queue. The proposed look-ahead heuristic determines the part type to be processed next in the serial process as well as the starting epoch of the batch process and the product type to be batched in a rolling horizon. This upstream rescheduling reduces batch process queueing times compared to the benchmark models.
