This method uses the imitation of purchasing a product in order to assess the effectiveness of work of shop employees or promoters at the places where promo-actions are being carried out.

An interviewer communicates with a seller/consultant/promoter as if he were a buyer and puts forward questions according to pre-specified scenario.

Upon the completion of the discussion the interviewer is obliged to tell the respondent that he/she became the participant in a research, and reflect the answers in a questionnaire only after having the respondent’s consent.