The suitable way to collect information such as the impression and preference the users have toward the product when they see it or use it, or complaint and comment they have in on regular basis, is focus group.
When conduct an interview by having a number of people gather together and exchange their comments, we can expect to receive valuable feedbacks, which we cannot draw out from one-by-one interview.
For example, focus group will be suitable for the following themes:
Email: info@humaninterface.co.jp (sales representative)
Create in 2000.09.07
Edit in 2010.04.27