Agile is an iterative and incremental methodology that aims to deliver small, incremental improvements to a project in a flexible manner.
Learn how to use a SWOT analysis in Six Sigma to improve your strategic planning. Includes step by step instructions and worked examples.
A business assessment process is a continual cycle looking at your current situation, where you want to be, and how you can get there.
All Six Sigma exams require knowledge of the Founding Fathers of Six Sigma and the Quality Movement. Here is a great study guide & reference for you:
Genichi Taguchi contributed several important concepts to the field of quality including the Taguchi Loss Function and Taguchi Robust design.