I have completed 88% of the coursework towards preparation for the Six-Sigma Green Belt certification exam. I like the layout of the material. It is all well laid out as if it was planned very methodically to teach the subject. I like the quizzes, the charts, and concepts provided in the materials. I highly recommend this course if you want to learn how to consolidate your workflow and design mechanisms for efficiency in providing products and services to customers that they will enjoy. This course will also provide you an understanding of how to monitor and update the processes you establish for effectiveness.