Phase 05 of 08
Integration
Typically 10-20% of total project cost. Connecting the ERP to surrounding systems — CRM, e-commerce, banking, EDI, warehouse, payroll, BI. Each connector is its own micro-project.
What's included
- Per-system integration design
- Connector development or licensing
- Identity / SSO integration
- Real-time vs batch sync architecture
- Error handling and reconciliation
- Performance testing under realistic load
Common overruns
- Connector vendor fees materialise after architecture is locked in
- Custom integrations that need rebuilding at each ERP upgrade
- Volume / throughput requirements discovered only at go-live
Source
Aggregator synthesis 2026.
Verified 2026-06-02
Other phases