Enterprise systems integration is the process of connecting two or more software applications (ERP, CRM, banking platforms, email tools, invoicing systems) so they share data automatically and bidirectionally, eliminating the need for manual entry and ensuring that all systems hold consistent, up-to-date information.
Most B2B companies use between 5 and 15 different applications day to day: ERP for financial and operational management, CRM for customer management, banking platforms, email, productivity tools, invoicing systems. When these systems don't talk to each other, the result is duplicate data, outdated information and time lost copying data from one system to another.
Why integration is essential
Systems integration is the foundation on which any effective automation is built. Without integration, each automation works in isolation. With integration, processes flow between systems automatically and continuously.
- Eliminates data silos: information lives in multiple systems but is consistent across all of them.
- Reduces data-entry errors: data is entered once and propagated automatically.
- Speeds up processes: what used to depend on someone copying data between systems becomes instantaneous.
- Enables end-to-end automation: processes that span multiple systems can be automated from start to finish.
Problems caused by non-integrated systems
| Problem | Consequence | Estimated cost |
|---|---|---|
| Duplicate data | Clients with multiple records, conflicting data | 5 to 15 hours/week of manual clean-up |
| Outdated information | Decisions based on incorrect data | Impact on sales, purchasing and planning |
| Repeated manual entry | Same data entered into 3 to 4 systems | 30 to 60 minutes per transaction |
| No integrated view | No one has a complete view of the client or process | Sub-optimal decisions |
Integration approaches
- Direct APIs (point-to-point): each system connects directly to another via API. Simple for 2 to 3 systems, but complexity grows exponentially with each additional system.
- Middleware/integration platform: a central layer that orchestrates communication between all systems. More complex to set up, but far more sustainable and scalable.
- ETL (Extract, Transform, Load): periodic processes that extract data from one system, transform it and load it into another. Suitable for synchronizations that aren't time-critical.
- Event-driven (real-time events): when something happens in one system (e.g. a new order), an event is triggered and the other systems are updated in real time.
Examples of common integrations
- ERP + CRM: when a sales rep closes a deal in the CRM, the order is automatically created in the ERP. The order status is updated in the CRM in real time.
- ERP + banking platform: payments received are automatically reconciled with open invoices in the ERP (see financial automation).
- Email + ERP: orders received by email are read, interpreted and created in the ERP automatically (see order automation).
- ERP + invoicing system: invoices generated in the ERP are automatically sent to the client and registered on the portal of the AT (Portugal's Tax Authority).
- CRM + marketing: leads captured in campaigns are automatically created in the CRM with the campaign context.
Integrations with ERPs used in Portugal
| ERP | Integration methods | Complexity |
|---|---|---|
| SAP | REST APIs, BAPI, IDOC, RFC | High |
| PHC | SOAP/REST web services, database | Medium |
| Sage | REST API, CSV/XML files | Medium |
| Cegid Primavera | Web services, SDK, XML files | Medium to high |
| Sendys | REST API, database | Medium |
How to plan an integration
- Map the data flows. Which data needs to flow between which systems, in what direction and how often.
- Audit the available APIs. Check which integrations each system supports natively.
- Set priorities. Start with the integration that has the greatest impact on the team's day-to-day work.
- Choose the approach. For a few integrations, direct APIs. For a complex ecosystem, middleware.
- Test thoroughly. Test data, error scenarios, realistic volume.
- Monitor in production. Alerts for synchronization failures, logs for auditing.
At Engibots, we help companies design and implement integrations between systems — ERPs, CRMs, banking platforms and productivity tools — to create automatic, reliable data flows.