Another key challenge, is how you can validate assumptions without having to develop anything. What happens when these assumptions never get tested early on, is that you can end up paying the full production cost of a product or feature that nobody ends up wanting.
That's an extremely painful situation, one that'll drain your team for sure. Building the right thing means creating a product or adding a feature that's valuable to your customers or end users. Which is something nobody can predict without actually creating or testing anything.
Luckily there's an easy way to do this. What you need is a prototyping tool like Figma or Framer. They're not just design tools, they can also be used to create flows and mimic the behavior of a real mobile app.
It's the perfect tool to test a set of features with your end users, without having to write a single letter of code