De Facto Consultancy is performing verification procedures upon completion of field data collection to make sure that the data collection was done properly. Besides logical control of all collected interviews, agency conductes physical verification of at least 10% interviews.
With this regard, we use two verification procedures:
• Through dialing randomly selected respondents via telephone,
• Through direct visit to randomly selected respondents from the sample.
The second group of techniques is based on the logical control of the validity of the questionnaire where we check consistency and logical connection response in the individual questionnaires.