PIUSS: Basic Comparision Between Lean and Six Sigma – Methodology
Lean instantly understands the activity and requirement of the process. If an activity adds value, it is later improved by a finer flow of process and subsequently improvement of manufacturing. Six Sigma focuses on particularly eliminating variations in the process output. Lean believes that any process which does not add value represents waste in the process and should be eliminated by decomposing the processes to their minimum levels. On the other hand, Six Sigma does not consider the value added aspect, and believes that defects in the process or output are waste. This could be regarded as a significant difference between Lean and Six Sigma. Lean is a persistent approach, with the perception that improvements are attainable irrespective of the fluctuations in the technology, environment, etc.