Your interview guide is your to-do list when you decide who you want to talk to and what you would like to know about. Conducting a good interview is about understanding the context and the people who are going to use your solution/product. Without a clear idea of the user, many tend to imagine a person similar to oneself, having the same requirements, needs or resources. An interview can be used in several stages: In the beginning to sharpen focus on the project focus, in the research phase to increase your knowledge of your customer or user experience and in response to ideas, concepts and prototypes.