The video call that keeps freezing
You're building a live video-call app. The picture keeps freezing for a second, then jumps ahead. Looking closer, you see that whenever one tiny packet of video gets lost on the way, the connection stops and waits — re-sending that one lost packet and holding back everything after it until the missing piece arrives. By the time the old packet finally shows up, that moment of the call is long gone, but everyone already saw the freeze.
You haven't read about this exact system. That's the point — walk the three questions a designer asks: what's really wrong, what fixes it, and what does the fix cost?
Diagnose
Read past the story. What's the REAL problem — not what the feature does, but what's actually going wrong?
Look past the story. What's the REAL problem here?