Abstract:
This paper describes approaches which are popular in manufacturing include Lean approach and Six Sigma approach. Lean approach can reduce wastes on process, develop continuous flow process and interest the whole process. Furthermore, Six Sigma approach can reduce variability in process, reduce defects to a minimum and focus on specific problem. In the other hand, the combination of Lean and Six Sigma approach is interested in a few industries. Therefore, a comparison between Lean and Lean-Six Sigma in process improvement via the continuous process is necessary to study for identity appropriate approach in organizations. In case study of outboard motor, the first approach to process improvement is Lean. An implementation Six Sigma had done after that. The result of Lean can reduce standard time 26.68% or 38.67 seconds/piece from 144.96 seconds/piece to 106.29 seconds/piece. The result of Lean-Six Sigma can reduce standard time 29.13% or 42.22 seconds/piece from 144.96 seconds/piece to 102.74 seconds/piece. The increment of Six Sigmas 5 steps can reduce standard time from Lean 3.34% or 3.55 seconds/piece from 106.29 seconds/piece to 102.74 seconds/piece. Moreover, Six Sigma approach does not value when comparing to investment. Therefore, Lean can be confirmed for appropriate approach of continuous flow process improvement. Nevertheless, a benefit of Six Sigma approach is the Six Sigma staff team mainly responsible for improvement. Also, full responsibility assigned to the team should be a part of Lean Approach which may increases more process efficiency.