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Advantages
- Questionnaires are appropriate for large groups of users, or customers, because it would be impractical to interview everybody individually.
- The same information is gathered from each user and so this makes it easy to compare the results. Sometimes results might be analysed statistically, or for a ‘medium’ sized group then each one would be analysed individually.
- The questions are planned in advance and so are designed to gather the information required.
- Questionnaires can also be useful if the analyst has difficulty getting appointment times with users.
- Honest answers are also more likely to be given on questionnaires if they are anonymous.
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Disadvantages
- Questionnaires are inappropriate for one user or a very small number of users because they do not enable the analyst to find out exactly what the user wants.
- The respondent to the questionnaire (the user) is restricted to answering just those questions and so the analyst can’t ask the user to elaborate.
- Questionnaires can appear to be impersonal which may alienate the user(s).
- Many users may not have the time to complete the questionnaire or just may ‘not be bothered’ meaning that not all questionnaires will be returned.
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