Interview is quite different from survey. In survey, information is collected from different people answering the same type of questions. But in interview, information comes from individuals. In survey there are many people, interview is limited to a few.
Interviews can be structured (planned) or (unstructured) unplanned. When questions are ready-made, the interview will be structured. But when questions are developed on the spot, depending on the answers of the respondent, it will be called unstructured.
Interviews can be intense. The researcher may have to spend a lot of time with the interviewee. Sometimes a person may have to be interviewed more than once. Interview is an old method of research. In this, researcher can renew the questions, alter them and include new questions. He can forward by correcting, altering and adding. But the problem here is that only a few people can be interviewed. Only opinions of a few selected people can be obtained. This is the major defect of interview method.
