What syllabus revision didn’t do for me, mock tests on processexam site did! I practiced daily on more than 330 real-time scenario based and practical questions daily. The processexam premium offered me unlimited access for two months which was more than enough. Next, i was able to do repeated attempts if i had doubts or wanted to gain expertise in some subject areas on the site. All this helped me to achieve good scores in the IASSC certified lean six sigma yellow belt certification exam.