Course instructors advise against taking two courses at the same time, except in the case of Supply Chain Analytics - SC0x which is always open. Graded assignments and exams often overlap. The weekly time to actively learn the concepts is estimated at 8-12 hours per week, though many learners report some weeks taking much more time. In the case of SC0x, the course is almost always open as a reference for all other courses. It is ok to enroll or verify in SC0x as your schedule permits.