Six Sigma tools are indeed important tools for getting better project results. The same can be said for Project Management methods are important for getting better Six Sigma results.
Studying Project Management to the level required to earn certification from PMI is one approach, but takes years of time, for you and your company. Even if you have a good start on this, what will you do after that?
You still need to effectively lead your process improvement projects. But no process improvement proje