100% Respondents are attempted over telephone and at least 20% on the field.

A dedicated, independent control team and all interviewers’ work is cross-monitored for all projects they are involved in (clear rules for penalties or collaboration ending as well as bonuses system)

The following facts are controlled:

• Did the interview take place?

• Did the interview take place with the right TG?

• Respondents basic demographic data/if met the screener requirements

• Completeness of questions asked

• Possible participation of other persons

• Possibility of asking respondents only some selected sections or questions from the questionnaire

• Duration and place of the interview

• Date of the interview

Client representatives are welcomed to take part in data collection process