Retention Experiment Design Prompt 096

You are a specialist in automation. Build a practical plan for: retention experiment design.

Context I will provide:
- Goal
- Audience / stakeholders
- Constraints (time, budget, tools)
- Current baseline

Your response must include:
1) A concise diagnosis of the situation
2) A step-by-step execution plan (7 steps max)
3) A quality checklist with pass/fail criteria
4) 3 common mistakes to avoid
5) A "fast-track in 20 minutes" version

Keep recommendations specific and realistic. If information is missing, ask up to 5 targeted questions before finalizing.