It means the selection of fragrances, for a specific purpose, from a number of available alternatives. In recent years a whole new profession has emerged in the perfume industry consisting of experts who specialise in this work. They are known as evaluators. Evaluation is work which requires not only talent, knowledge and training, but also a feeling for what the market wants at any particular time. The evaluators (women, in many instances) are an important link between the creators and the users of perfumes.