Production Line Availability-Based Production Planning Optimization Model in Semiconductor Fabrication

Semiconductor manufacturing processes are characterized by high complexity and long lead times, making efficient production planning crucial. Existing methods using fixed and proportional lead times fail to adequately reflect production line variability. This study proposes an optimization model for semiconductor production planning that considers production line availability. The proposed model addresses this issue by distinguishing between available and non-available work-in-process (WIP). The suggested model was tested using a simulation method, which verified that it significantly reduces the discrepancy between planned and actual throughput, enhancing the feasibility of production plans while demonstrating superior performance in achieving high order fulfillment rates. Additionally, it maintained short lead times while reducing the variance in WIP and achieving high production volumes. This facilitates the company in managing its production line efficiently, thereby promoting improvements in productivity and profitability.