" I realized that it all comes down to "metrics" - end of every sprint, my manager has to present it to his bosses". I wonder how widespread this is.. Certainly that's exactly what I experienced at a previous workplace, and worse than that, people's performance was judged on whether they'd done exactly the "right" stories in a 2 week sprint. Rather than thinking about developing software, people were working out how to game the system to ensure their metrics were good. I cannot see how this can have done the employer any good. I've now moved jobs, to a place that's far more Kanban, and if mid-story we encounter bugs that need fixing, or opportunities to improve something, or something else useful that piques our fancy, then as long as the whole team agree and our overarching goals are being worked toward , we can work naturally, rather than rigidly.