Your question is Prepare a Process-and-Impact Portfolio Story. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're preparing a portfolio presentation for a UX/UI design interview and want one case study to show not just polished screens, but how you worked through the problem and what changed because of your work.
How do you prepare a portfolio story so it highlights both process and impact?