研究結果發現，生產週期會受批量數量影響，而批量過多則使生產週期拉長，並影 響產出。再者，在現有生產水準下，利用串聯式批量生產模型搭配總生產效率模型(Total Operational Efficiency;TOE)，縮減週期時間提升產出量，以案例公司發現，顯著日產量 增加40%，週期時間縮減37%。故透過本研究，協助設計廠商或是代工廠商了解生產週 期與產出量的相互影響關係，生產製造商也可以利用本文兩個模型發展更適配的生產規 劃。;The production planning is most important for manufacturer in semiconductor industry. Purpose of planning capacity is not only obtain maximum throughput but also maintain the balance between capital asset and high machine usage for long-term competitiveness in this industry. Now the behavior of manufacturer is actively accepting and creating new business or decreasing the utilization reduce the cycle time to maintain the balance. We can say production planning be impacted by cycle time and the usage of resource may create advantage for the company.
For the past production planning, manufacturer find capacity shortage at cycle time lengthened and forecast from customer per month. At the same time, manufacturer will evaluate expend the capacity or not and usually purchase the equipment solve the shortage. It is one of solution for capacity shortage, but overmuch capacity will occur the demand sharp decrease.
This research is looking forward to increase the capacity by two models- serial process batching model and total operational efficiency model. Besides, the semiconductor process is pretty much, and usually use batch production more flexible. The research will use serial process batching to analysis the cycle time including process time, setup time and handling time and to get more proper cycle time. On the other hand, shorter cycle time means faster product produced and shorter the cash payback period. But fluctuation of cycle time will impact capacity utilization, we also want short the cycle time and raise the throughput at the same time.
Finally, the cycle time will fluctuated by number per batch. If number is large, the cycle time will be lengthened and impact the throughput. We use the serial process batching model and total operational efficiency model to increase the capacity by down CT. Based on the case company, we estimate the throughput will increase 40% and the cycle time decrease 37%. The IC design house get more understand on production manufacturer and help manufacturer develop his own production planning through this research.
