| dc.description.abstract | Six Sigma (called 6σ) is a management of top to bottom (Su, 2009), we can understand customer request through high manager. We transfer to internal improvement because we understand customer request. It can reduce cost. At the same time, it also can increase production capacity and potential efficiency for company. We take D company as an example. This study will optimize product’s turnover and yield rate to achieve long-term quality management by DMAIC of Six Sigma. Five steps are Define, Measure, Analyze, Improve and Control. At define step, we listen customer voice. It can find out customer request and critical to quality (CTQ), we use them as improvement target. This study will illustrate industrial chain of upstream and downstream during SIPOC procedure. At measure step, define a measurement plan and confirm its efficient and consistency. At the same time, it also can confirm production capacity and take them as performance target. At analyze step, we have to find out root cause of testing fail after burn-in through cause and effect diagram. Pareto chart and five whys filter main issue to improve. At improve step, corrective action is effective through pilot run. At control step, we take corrective action of last step to standardize. Target is keeping corrective action. This study improves D company to increase production capacity, machine’s turnover and yield rate. It also can reduce cost of machine and man. Potential efficiency is customer satisfaction. Finally, this study summarize Six Sigma can reduce cost and also can increase production capacity. Six Sigma’s method and tooling can vertically extend next step and execute horizontal development on other models. We also achieve target of Total Quality Management (TQM). | en_US |