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Data-driven aggregate modeling of a semiconductor wafer fab to predict WIP levels and cycle time distributions.
- Source :
- Flexible Services & Manufacturing Journal; Jun2024, Vol. 36 Issue 2, p567-596, 30p
- Publication Year :
- 2024
-
Abstract
- In complex manufacturing systems, such as a semiconductor wafer fabrication facility (wafer fab), it is important to accurately predict cycle times and work-in-progress (WIP) levels. These key performance indicators are commonly predicted using detailed simulation models; however, the detailed simulation models are computationally expensive and have high development and maintenance costs. In this paper, we propose an aggregate modeling approach, where each work area, i.e., a group of functionally similar workstations, in the wafer fab is aggregated into a single-server queueing system. The parameters of the queueing system can be derived directly from arrival and departure data of that work area. To obtain fab-level predictions, our proposed methodology builds a network of aggregate models, where the network represents the entire fab consisting of different work areas. The viability of this method in practice is demonstrated by applying it to a real-world wafer fab. Experiments show that the proposed model can make accurate predictions, but also provide insights into the limitations of aggregate modeling. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19366582
- Volume :
- 36
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Flexible Services & Manufacturing Journal
- Publication Type :
- Academic Journal
- Accession number :
- 177598678
- Full Text :
- https://doi.org/10.1007/s10696-023-09501-1