1. Questionnaire, also known as questionnaire or inquiry form, is a kind of printed document that systematically records the survey content in the form of questions.
2. The questionnaire can be in table format, card format or bookkeeping format.
3. Designing a questionnaire is the key to the inquiry survey.
4. A perfect questionnaire must have two functions, namely, it can convey the questions to the people being asked and make them happy to answer.
5. To complete these two functions, the questionnaire design should follow certain principles and procedures, and use certain skills.
