churn-prevention（客户流失预防）

Churn Prevention

Production-grade SaaS churn reduction framework covering cancel flow architecture, dynamic save offer mapping, exit survey design, dunning sequence engineering, payment recovery optimization, win-back campaigns, and churn impact modeling. Addresses both voluntary churn (customers who decide to leave) and involuntary churn (customers who leave due to payment failure).

Table of Contents

• Initial Assessment
• Churn Taxonomy
• Cancel Flow Architecture
• Exit Survey Design
• Dynamic Save Offer System
• Dunning Sequence Engineering
• Win-Back Campaign Framework
• Churn Health Scoring
• Metrics and Benchmarks
• Churn Impact Calculator
• Output Artifacts
• Related Skills

Initial Assessment

Required Context

Churn Taxonomy

Voluntary Churn (Customer Decides to Leave)

Involuntary Churn (Payment Fails)

Cancel Flow Architecture

The 5-Stage Cancel Flow

[Cancel Button] → [Exit Survey] → [Dynamic Save Offer] → [Confirmation] → [Post-Cancel]

Stage 1: Cancel Trigger

• Cancel option is findable (Settings > Account > Cancel). Do not hide it.
• Clicking "Cancel" starts the flow -- it does not immediately cancel the account
• Works on both desktop and mobile

Stage 2: Exit Survey (Required, 1 Question)

Question: "What is the main reason you are cancelling?"

Present as radio buttons (not a dropdown). Maximum 8 options:

Rules:

• Survey is required before showing the save offer (the answer determines the offer)
• One question only. No multi-page surveys.
• Optional free-text field for "Other" and as a supplement to any selection
• Track response distribution monthly to identify systemic issues

Stage 3: Dynamic Save Offer

Map each exit reason to exactly one save offer:

Offer presentation rules:

• One clear offer per screen (not multiple choices)
• Quantify the value: "Save $120 over the next 3 months" not "Get a discount"
• CTA: "Accept Offer" vs "Continue Cancelling" (both clearly labeled)
• No countdown timers, no fake urgency
• No guilt-trip copy

Stage 4: Confirmation

If they decline the save offer or there is no offer to make:

┌────────────────────────────────────────┐
│  We're sorry to see you go             │
│                                        │
│  What happens when you cancel:         │
│  - Your data is saved for 90 days     │
│  - Access continues until [date]      │
│  - You can reactivate anytime         │
│                                        │
│  [Yes, Cancel My Account]             │
│  [Wait, I Changed My Mind]            │
│                                        │
│  No pre-checked boxes.                │
│  No confusing language.               │
└────────────────────────────────────────┘

Stage 5: Post-Cancel

Exit Survey Design

Data Analysis Framework

Track exit survey responses monthly and calculate:

Competitive Intelligence from Exit Surveys

When users select "Switching to a different product":

• Ask a follow-up: "Which product are you switching to?" (optional, free text or dropdown)
• Track the top 3 competitors winning your churners
• Feed this data into competitive-teardown skill for quarterly analysis

Dynamic Save Offer System

Offer Economics

Save Offer Decision Tree

User selects exit reason →
├── PRICE →
│   ├── Customer ARPU > median? → Offer 30% discount
│   └── Customer ARPU < median? → Offer downgrade to cheaper plan
├── LOW_USAGE →
│   ├── Last login > 30 days? → Offer pause
│   └── Last login < 30 days? → Offer usage tips + discount
├── MISSING_FEATURE →
│   ├── Feature on roadmap? → Share roadmap + workaround
│   └── Feature not planned? → Offer discount or acknowledge gap
├── COMPETITOR →
│   ├── Known competitor? → Show comparison + retention offer
│   └── Unknown competitor? → General retention offer
├── PROJECT_END →
│   └── Always → Offer pause
├── COMPLEXITY →
│   ├── Enterprise/high-value? → Offer dedicated onboarding session
│   └── SMB/low-value? → Offer guided tutorial link
└── TESTING →
    └── Always → No offer, let go gracefully

Dunning Sequence Engineering

Failed payments cause 20-40% of total churn. Most of it is recoverable with proper dunning.

Smart Retry Schedule

Do not retry immediately after failure. Cards often recover within 3-7 days.

Card Updater Services

Enable automatic card updating to prevent expired card churn:

Dunning Email Sequence

Email rules:

• Every email links directly to the payment update page (not the dashboard)
• No guilt, no shame. Card failures happen.
• Subject lines are specific (include product name)
• Include the amount owed and the card last 4 digits
• Offer a support channel for customers who need help

Win-Back Campaign Framework

Win-Back Timing

Win-Back Email Sequence

Day 7 Email:

• Subject: "Your [Product] account is waiting for you"
• Body: What they left behind (data, projects, team). One CTA: reactivate.
• No discount. Just value reminder.

Day 30 Email:

• Subject: "Here's what's new in [Product]"
• Body: 2-3 specific improvements since they left. One CTA: reactivate.
• Small incentive: "Come back with 1 month free"

Day 60 Email:

• Subject: "We'd love to have you back -- [offer]"
• Body: Strongest offer (50% off 3 months or extended free period). Clear deadline.
• Final significant outreach attempt.

Churn Health Scoring

Leading Indicators of Churn

Risk Score Calculation

Risk Score = Sum of (Signal Weight x Signal Present)

0-20: Low risk (monitor)
21-40: Moderate risk (proactive outreach)
41-60: High risk (intervention required)
61+: Critical risk (executive escalation)

Metrics and Benchmarks

Key Metrics

Red Flags

Churn Impact Calculator

Quick Estimate

Monthly MRR at risk = Total MRR x Monthly churn rate
Annual MRR saved by 1% churn reduction = Total MRR x 0.01 x 12
Annual MRR saved by 20% save rate = (Monthly MRR at risk x 0.20) x 12

Example:
  MRR: $500,000
  Monthly churn: 4% = $20,000/month lost
  Reduce to 3% = $5,000/month saved = $60,000/year
  Add 20% save rate on remaining = $3,000/month saved = $36,000/year
  Total annual impact: $96,000

Output Artifacts

Related Skills

• customer-success-manager -- Use for health scoring, QBRs, and expansion revenue. Not for cancel flow or dunning design.
• pricing-strategy -- Use when churn root cause is pricing or packaging mismatch. Not for save offer design.
• onboarding-cro -- Use when churn traces back to poor activation. If users never experienced value, fix onboarding first.
• referral-program -- Use for acquisition. Churn prevention handles the other end of the funnel.

Tool Reference

1. churn_impact_calculator.py

Purpose: Calculate the revenue impact of churn reduction at various improvement levels.

python scripts/churn_impact_calculator.py --mrr 500000 --churn-rate 4.0 --save-rate 20
python scripts/churn_impact_calculator.py --mrr 500000 --churn-rate 4.0 --save-rate 20 --json

2. dunning_sequence_analyzer.py

Purpose: Analyze dunning email sequence effectiveness and recommend retry timing optimizations.

python scripts/dunning_sequence_analyzer.py dunning_data.json
python scripts/dunning_sequence_analyzer.py dunning_data.json --json

Input JSON format:

{
  "failed_payments": [
    {
      "payment_id": "PAY-001",
      "amount": 99.00,
      "failure_reason": "expired_card",
      "retry_attempts": [
        {"day": 0, "recovered": false},
        {"day": 3, "recovered": false},
        {"day": 7, "recovered": true}
      ]
    }
  ]
}

3. exit_survey_analyzer.py

Purpose: Analyze exit survey responses to identify churn patterns, save offer effectiveness, and systemic issues.

python scripts/exit_survey_analyzer.py survey_data.json
python scripts/exit_survey_analyzer.py survey_data.json --json

Troubleshooting

Success Criteria

• Monthly voluntary churn rate below 2.5% (below 1.5% is excellent)
• Monthly involuntary churn rate below 1.0% (below 0.5% is excellent)
• Cancel flow save rate of 15-25% (above 20% is excellent)
• Payment recovery rate of 30%+ on failed payments
• Exit survey completion rate above 80%
• Win-back reactivation rate of 5-10% within 90 days post-cancel
• Save offer acceptance rate above 20% with retained customers staying 6+ months post-save

Scope & Limitations

• In scope: Cancel flow design, exit survey architecture, save offer mapping, dunning sequences, payment recovery, win-back campaigns, churn impact modeling
• Out of scope: Product-market fit analysis, pricing restructuring, ICP redefinition, customer acquisition
• Data dependency: Scripts analyze point-in-time snapshots from JSON input; no real-time CRM integration
• Not predictive ML: All scoring is deterministic and algorithmic -- no machine learning models
• Legal note: Cancel flows must comply with FTC guidelines (US) and consumer protection laws (EU) -- do not make cancellation unreasonably difficult
• Revenue estimates: Impact calculations are projections based on input assumptions, not guarantees

Integration Points

• customer-success-manager -- Feed health scores into churn risk assessment; use churn data to calibrate health score thresholds
• pricing-strategy -- When exit survey data shows PRICE as the dominant reason (>30%), escalate to pricing-strategy for structural pricing review
• onboarding-cro -- When exit survey data shows LOW_USAGE or COMPLEXITY as top reasons, the root cause is often poor activation; fix onboarding first
• revenue-operations -- Pipeline and forecast models should account for churn reduction impact on net revenue retention (NRR)
• referral-program -- Retained customers from save offers are candidates for referral program enrollment after 90 days of continued usage