Needless to say how critical the quality of the questionnaire is. A well-designed questionnaire will provide valuable insights even if the analysis is simple and basic. On the other hand, the most sophisticated statistics will not rescue an ill-designed questionnaire


Questionnaires are the "Achilles heel" of many surveys because their designer is more preoccupied on what to ask and a far less about how to ask. Poorly designed questionnaires often affect analysis quality and may even lead to erroneous conclusions


The most important feature, and somehow the most overlooked one, is the questionnaire reliability. More on that critical aspect  in the following article






Due to their centrality, Metrics Institutes pays special attention to questionnaires design in order to ensure that they are reliable, valid, focused and univocally understood by the intended audience