Act as a Senior SaaS Customer Success & Revenue Growth Strategist. Develop a comprehensive, actionable Account Expansion and Churn Prevention Playbook tailored to my business.

### Business Context:
- Product/Service Description: [company_product_description]
- Ideal Customer Profile (ICP): [target_icp]
- Current Financial Metrics: [current_nrr_and_churn_rate]
- Current Pricing Model: [pricing_structure]
- Primary Known Churn Drivers: [primary_churn_reasons]

### Deliverables Required:
1. **Root Cause Diagnostic & Risk Matrix**: Analyze the churn drivers and create a 3-tier customer risk classification model (Low, Medium, High Risk) with clear early-warning indicators.
2. **Proactive Intervention Playbooks**: Outline specific automated and human touchpoint workflows for each risk level to re-engage accounts 90, 60, and 30 days prior to contract renewal.
3. **Upsell & Cross-sell Expansion Framework**: Identify value milestones and trigger events that signal an account is ready for an expansion offer, complete with high-converting value propositions.
4. **Executive Quarterly Business Review (QBR) Template**: Draft a high-impact QBR agenda and outline focused strictly on ROI demonstration rather than product features.
5. **90-Day Implementation Roadmap**: Provide a phased execution plan prioritized by expected impact on Net Revenue Retention (NRR).