The proof behind the pitch.
A strong case study shows what happened, what changed and what still cannot be claimed.
Show the starting point
A result needs context. Describe the situation before the work began, the period being measured and the source of the numbers. If no baseline exists, say that the first measurement establishes one.
Explain the intervention in plain language. A list of tasks is useful, but it should not be confused with a list of business outcomes.
Keep the claims proportional
If you published six articles, you can demonstrate publication with links and dates. Whether those articles caused more inquiries is a different question. Separate direct evidence from interpretation and avoid treating all movement as the effect of one action.
A compact evidence table can contain the metric, period, source and limitation. Missing data belongs in that table too; it should not be replaced with a zero.
Make the story useful
Include the decisions a reader could apply to their own situation. What was tried? What was changed? What would you do differently? The point is not to remove uncertainty from the story, but to explain what was learned.