Henning von VogelsangQuite a helpful guide. Be careful not to stick with questions that are too generalising. Your product may pose hurdles that can’t be covered with generalSee more questions. Also, one round does not cover it. Going through the same questions with different people after you addressed the issue is necessary to confirm that you were successful in addressing it. Lastly, don’t think that the results are all about solving problems. You might discover new potentials through customer interviews you weren’t aware of.