Depending on the objective of the study, participants to the “Voice of the Customer” programme will be selected at random, according to specific criteria. They will then be contacted by phone or by email to participate in the study. If you are selected, you will always be informed in the invitation of the context and type of survey (Internet questionnaire, interview, etc.), of the place of the study and its duration.  Taking part in a study is always on a voluntary basis. You get to decide if and when you want to participate.  Being part of the programme does not entitle you to participate in a study. Selection is made based on specific criteria.