This paper presented a way that can apply efficiently DMAIC that is general progress step of manufacturing process Six Sigma. Each step activity of Six Sigma techniques is as following. Define(D) step chooses project and compose team. Measure(M) step grasps process and describe problems. Analyze(A) step analyze causes about problems, Improve(I) step finds and optimize parameters of causes and, Control(C) step keeps and manage the optimized parameters. This research examined "Manufacturing process Improvement" example that use Six Sigma techniques for positive research for efficient Six Sigma model of manufacturing process. PBA function testing process of monitor manufacturing process is engaged much manpowers and equipments. We solve that problems through improvement of Test system and process using Six Sigma techniques. The result is that average test time is shortened, jigs purchase expense is reduced and managing depart`s repetitive and simple works are removed.