You have an awesome point. I will talk about that more probably in my next post. This is very important and I think it is crucial to do that step early and with great quality, because everything goes from there. If you gather the wrong data you will make wrong conclusions, hence you will work on your project with the wrong idea. It is even harder when you have no data at all.
Thank you for reminding me of this topic. I wrote about these steps a few years ago and I might complete it now and make a post out of it. Hope to see your comment there also! Thanks man :))
RE: Designing mobile app - Trends, features, catches, advices... no.1