A good case study is not a trophy. It is a story a prospect tells themselves about what working with you would feel like. Most of the case studies I review as an editor fail at exactly that job: they open with the client's logo, bury the result in paragraph four, and end with a quote nobody would say out loud.
1. Lead with the result, not the client
Your reader decides in the first two lines whether this story is about someone like them. Put the headline number up front: "Cut onboarding time from 14 days to 3" beats "Acme Corp partnered with us" every time.
2. Name the problem in the client's words
Quote the client describing the pain before you describe your fix. The language should sound like a Slack message, not a press release. If you only have polished quotes, ask one more question: "What did Monday mornings look like before this?"
3. Show the work in three beats
The constraint you inherited (budget, timeline, legacy system)
The decision you made that a competitor would not have
The moment it almost went wrong, and what you did about it
4. Make the numbers honest
One real number with its baseline is worth five vague percentages. Always state the time window and the baseline. If a result cannot be measured, say so and describe what changed qualitatively instead.
A case study that admits one limitation earns the right to be believed about everything else.
5. End with the next conversation, not a sales pitch
Close with the question a reader in the same situation should ask themselves, then offer one low-friction next step. For more on narrative structure in business writing, the classic reference is the Nielsen Norman Group article on how users read on the web.
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