Why case studies matter
Many design adverts ask for a portfolio, and many say they want to see your process and design rationale, meaning the reasons behind your choices. A case study tells the story of one project from problem to result. Two or three strong case studies are worth more than twenty pretty screens with no explanation.
A simple structure
Keep each case study short enough to read on a phone or a laptop in a few minutes. A clear structure:
- Summary. One or two sentences: the problem, who it was for, your role and the outcome.
- The problem. What was wrong and why it mattered to users and the business.
- Research. Who you spoke to or watched, where, and the key findings. Include one or two real quotes (with no personal details).
- Ideas and options. Sketches or wireframes of different ideas, and why you chose one.
- Design. The final screens or flows, with short notes on key decisions.
- Testing. What happened when people tried it, and what you changed.
- Outcome and learning. What changed because of your work, and what you would do differently.
Show your reasons
For each key decision, say why. "I moved Check balance to option 1 because six of the eight members I interviewed said it was the first thing they do" is far stronger than "I improved the menu". Your reasons should come from research, testing or clear design principles.