| Summary: | 碩士 === 台灣首府大學 === 工業管理學系研究所 === 101 === Under the enterprise competitors of globalization, product quality has become one of the most important problems. Managers of enterprises tried to improve the quality of the process to lower defect rate. This research is a case study for improving the quality of the touch panel through the printing process condition selected and proposed for A company.
In order to get the better condition of the screen printing process through the least number of experiments, the Taguchi method would be used in this study to design parameters and its levels, and then carry out the experiments and data analysis. Furthermore the Six Sigma method (Define, Measure, Analyze, Improve, Control, DMAIC) was used to improve the quality problems to reduce the cost of wasted adverse.
Through a systematic and logical approach for the case company's screen printing process, robust design concept mentioned by Taguchi was used in the improved stages to replace the traditional design of experiments. Because it would enhance the process capability based on the principles of fast-production and low-cost. Furthermore, in order to ensure the improvement of product quality and avoid the undesirable product wasted to achieve the goal of Six Sigma, the quality management and control system with key quality characteristics was established in the study.
The results showed that if the optimal parameter conditions replaced the current parameter conditions in the case company of A, defect rate would be reduced from 0.32 to 0.13 with approximately 60%. It was close to the predicted values with 68.26%, which calculated by the quality loss ratio formula. To reduce the defective rate due to human negligence to achieve the goal of Six Sigma, the standard operating procedures will be proposed to strictly apply in the various stages of the process.
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