**4. Six Sigma DMAIC methodology applied to gasification**

Six Sigma DMAIC is a systematic methodology with phases, steps, and tools. **Figure 4** shows the main steps when applying the Six Sigma DMAIC methodology. It also shows the activities and tools to use and the expected outputs; this chapter will follow some of the steps using some of these tools.

**Figure 4.** *DMAIC's main aspects.*

*Application of the Six Sigma DMAIC Methodology to the Gasification Process DOI: http://dx.doi.org/10.5772/intechopen.111850*
