# AS4 Settlement Incident Response Procedures

**Date**: 2026-01-19  
**Version**: 1.0.0

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## 1. Incident Classification

### 1.1 Severity Levels

- **CRITICAL**: Service outage, data breach, security incident
- **HIGH**: Partial service degradation, performance issues
- **MEDIUM**: Non-critical errors, minor performance impact
- **LOW**: Informational issues, minor bugs

### 1.2 Response Times

- **CRITICAL**: 15 minutes
- **HIGH**: 1 hour
- **MEDIUM**: 4 hours
- **LOW**: Next business day

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## 2. Incident Response Process

### 2.1 Detection

1. Monitor alerts and logs
2. Receive incident report
3. Classify severity
4. Assign incident owner

### 2.2 Response

1. Acknowledge incident
2. Assess impact
3. Notify stakeholders
4. Begin investigation

### 2.3 Resolution

1. Identify root cause
2. Implement fix
3. Verify resolution
4. Document incident

### 2.4 Post-Incident

1. Post-mortem meeting
2. Incident report
3. Action items
4. Process improvements

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## 3. Common Incidents

### 3.1 Service Outage

**Symptoms**: All requests failing, service unavailable

**Response**:
1. Check infrastructure health
2. Verify database connectivity
3. Check application logs
4. Restart services if needed
5. Escalate if unresolved

### 3.2 Message Processing Failure

**Symptoms**: Specific instructions failing

**Response**:
1. Identify failed instruction
2. Check error logs
3. Verify member status
4. Retry if appropriate
5. Manual intervention if needed

### 3.3 Certificate Issues

**Symptoms**: TLS handshake failures, signature validation failures

**Response**:
1. Verify certificate validity
2. Check certificate expiration
3. Update Member Directory if needed
4. Notify affected members

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## 4. Escalation

### 4.1 Escalation Path

1. On-call engineer
2. Engineering lead
3. CTO
4. Executive team

### 4.2 Escalation Triggers

- CRITICAL incidents unresolved after 1 hour
- Security incidents
- Data breaches
- Regulatory issues

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## 5. Communication

### 5.1 Internal Communication

- Slack channel: #as4-incidents
- Email: as4-incidents@dbis.org
- PagerDuty: For critical incidents

### 5.2 External Communication

- Member notifications via email
- Status page updates
- Public communication if required

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**End of Document**