It is a long and complex process to become a Master Perfumer, and there are very few people who qualify. Not only is it necessary to have an extremely sensitive and delicate nose (nez), perfumers must understand detailed molecular chemistry in order to construct compositions that will work together. It generally takes at least ten years of study and industry experience to qualify, and there are less than a hundred Master Perfumers globally. When someone achieves this feat, it generally will be an important item of industry news.