ERP Integration Guide: Ending Manual Data Entry
In most companies the ERP is the centre: accounts, stock, orders and invoices live there. But sales happen in the web store, shipping in the carrier's system and field data on tablets. When these systems aren't connected, people fill the gap: copy, paste, retype. This guide covers how to close that gap with reliable integration.
Step 1: Map the data flows
Before writing code, put the answers in a table:
- Which data? Orders, accounts, stock, prices, invoices, payments
- From where to where? Which system is the source, which the target?
- How often? Real time, hourly, end of day?
- Who is the source of truth? If the same data can change in two systems, which wins?
The last question matters most. If stock can be edited by hand in both the ERP and the e-commerce panel, no integration will keep them consistent.
Step 2: Define mapping rules
Systems rarely speak the same language. Product codes, units, tax rates, customer numbers and status codes differ. Keep these differences in manageable mapping tables rather than hard-coding them, so a new product group doesn't require a developer.
Step 3: Design for failure
Integrations work on the happy path. In real life the other system is down, the same order arrives twice after a network error, an unmapped product code appears, or a format changes after an update.
A reliable integration knows what to do in each case: queue, retry automatically, never process the same record twice (idempotency) and alert a person when needed. These principles are the foundation of our system integration work.
Step 4: Choose the right method
| Method | When |
|---|---|
| API (REST/SOAP) | The system offers a modern API — first choice |
| Webhook / event | Real-time notifications such as new orders |
| Database view | No API; read-only, controlled access |
| File transfer (CSV/XML) | Legacy systems and bulk transfers |
Putting a secure adapter in front of legacy systems means replacing them later won't affect other connections. See our API development approach.
Step 5: Launch with a parallel run and monitoring
Don't switch on the integration overnight and turn off the manual process. Run both in parallel, compare results, then cut over. After launch, keep a dashboard that logs every transfer and alerts when error thresholds are crossed.
Common mistakes
- No source of truth: the same data stays editable in two places.
- Ignoring failure: data silently disappears at the first outage.
- Hard-coded mappings: every new product becomes a development ticket.
- No monitoring: a stopped integration is noticed when a customer complains.
- Connecting everything at once: start with the most painful flow, then expand.
Where to start
Pick the single flow that costs the most manual effort and errors — in most companies, getting orders into the ERP. Once it runs reliably, other flows are added much faster on the same foundation. Planning a broader transformation? See our enterprise software approach.