It is one of the different techniques of product testing, where respondents test one or more products at specifically designed and equipped rooms for market research (called facilities or central locations). Respondents, mainly pre-recruited, go on specific days and times to the venue: the methodology “in hall test” is preferred when it is crucial that the products are stored, prepared and served to all the respondents in all the areas involved in the test in the same way, or in case of delicate samples (fresh products, for example) or prototypes. In this way, product preparation is entirely carried out by expert staff; the questionnaire can be administered by an interviewer or self-completed by respondents, on paper or tablet/pc.