OnXeon Journal
Integration Patterns for CRM and ERP Systems
A practical architecture model for keeping customer, commercial and operational data aligned without creating fragility downstream.
1. Define System-of-Record Ownership
Explicit ownership removes conflict and reduces duplicate updates. Define which platform owns each object and field set before integration build starts.
- Leads and opportunity lifecycle often originate in CRM
- Orders, invoices and inventory usually belong in ERP
- Reference data needs clear authority and refresh strategy
2. Reliable Delivery Patterns
- Idempotent writes to prevent duplicate transactions
- Retry strategy with exponential backoff and max attempts
- Dead-letter queue for non-recoverable failures
- Replay tooling for controlled incident recovery
3. Observability Standards
- Correlation IDs across CRM, middleware and ERP
- Error classification by business impact
- Queue lag and sync latency thresholds
- Reconciliation dashboards for key records
4. Integration Change Control
Use versioned contracts and structured release gates. Most integration outages happen due to unmanaged field changes or undocumented assumptions.