There is no official organization of Six Sigma in the world, but people tend to choose well-known and active organizations to obtain relevant certification. At present, there are six famous international certification bodies for horses: American Quality Association (ASQ) and International Lean Six Horses Research Institute (ILSSI). In China, more people talk about china association for quality (CAQ). Among them, ASQ and CAQ are both examination institutions, and you can complete it by self-study, while the certification of ILSSI can be obtained through the training and examination of its recognized institutions. At present, the only training institution that has obtained ILSSI certification in China is Yousi College for the time being. You can look for it in official website and make a unified inspection.