Personalized result book helps a lot

Thanks to ICBB practice questions, i got the confidence to attempt the IASSC Certified Lean Six Sigma Black Belt certification exam. Long long ago, when there was nothing like online system for practice, we had to depend on PDF questions which were not only static but boring as well. However, with the introduction of, practice sessions have become interesting and engaging. Hats off to all those who came up with this idea!