Write a Case Study Narrative Outline

Write a case study narrative outline from the following inputs:

Customer or company: [CUSTOMER NAME OR ANONYMIZED]
Industry: [INDUSTRY]
Problem before you: [PROBLEM]
Solution used: [PRODUCT OR SERVICE]
Results you can claim with evidence: [METRICS OR QUALITATIVE OUTCOMES]
Quotes available: [YES / NO / DRAFT NEEDED]
Audience for the case study: [PROSPECT PERSONA]
Length target: [SHORT WEB / LONG PDF]

Requirements:
1. Outline a narrative arc: context, challenge, approach, results, lessons.
2. Only use results provided. Mark any desired claims without evidence as [NEEDS PROOF].
3. Suggest interview questions if quotes are missing.
4. Keep the outline useful for writers and designers (section goals, not fluff).
5. Include a CTA idea aligned to the audience without hard-sell spam.

Deliverables:
1. Full narrative outline with section purposes and bullet beats.
2. Proof checklist (metrics, artifacts, quotes).
3. Suggested headline options (5) and a meta description draft.