Following are the three differences between a questionnaire and a schedule :
1. A questionnaire is filled up by the informant, while a schedule is filled by the enumerator after making enquiry from the informant.
2. A questionnaire is filled up by the informant through post, while an enumerator personally goes to the information provider along with the schedule.
3. In a questionnaire, the investigator is not in personal contact with the information provider, while there is personal contact in case of a schedule.
