3) The questionnaire technique
A printed paper questionnaire or an electronic one is designed first consisting of questions to be answered by
occupants. The questionnaires will then be distributed by traditional methods or through the Internet. Occupants’
participation might be very poor [33]. Whether a satisfactory survey result can be achieved depends largely on the
design of the questionnaire and occupants’ understanding of and commitment to it. This method is used in only a
few surveysdue to big uncertainty in the data.