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Advantages
- More detailed information can be obtained than questionnaires because the interviewee can answer open questions with open answers
- The analyst can ask the users to elaborate upon their answers meaning that they can get detailed responses and therefore get all the information that is needed
- Additional questions can be asked if the analyst suddenly thinks of something that may provide useful information
- Opinions can be expressed informally
- Body language can be read meaning that the interviewer gets more information about the interviewee’s feelings or opinions about current or future systems
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Disadvantages
- Interviews are time consuming because they have to be planned, arranged, carried out and then the responses need to be analysed.
- Interviews are not appropriate for lots of users because of the amount of time it would take
- Interviews do not provide statistical data analysis because they are not as structured as questionnaires
- It may be difficult to arrange a mutually convenient time for the interview
- Lack of anonymity may lead to honest answers not being given and therefore true opinions about the current or future system cannot be elicited
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