Most case studies are testimonials wearing a suit. Quote from the CEO, three feature bullets, a stock photo. Nobody closes deals with that. The structure that works has five parts, and the customer is not the hero. One: the situation in numbers before the product. Two: what they tried first that failed. This is the part everyone skips and it is the credibility engine. Three: the specific moment of change, what actually got deployed. Four: results with one number that matters most. Five: what they would do differently. That last question turns a brochure into advice and advice gets forwarded to decision makers. Your case study is not a trophy. It is a proxy sales call that works while you sleep.