Connecting systems can reduce repeated work, but both sides must agree on what the information means. Sales, inventory and accounting tools may use different identifiers, timing rules and definitions of a completed transaction. A useful integration brief explains those differences before data begins to move. It also defines how the business recognises and resolves problems after launch.
Assign ownership to records
Decide which system is authoritative for customers, products, stock and transactions. Different record types may have different owners. Document which fields can be edited in each tool and how changes reach other teams. Without ownership rules, one system can overwrite a valid update from another. A clear decision about where information is maintained prevents avoidable conflicts later.
Map real fields and identifiers
Use sample records with sensitive details removed to compare fields, formats, required values and units. Dates, quantities and addresses can look straightforward while having different meanings in connected tools. Use stable identifiers rather than names alone. Decide how new records are matched, how duplicates are reviewed and how corrections are handled. Preserve a mapping that someone can check after migration.
Choose practical synchronisation timing
Some changes need to move quickly; others can be processed in a scheduled batch. Choose timing according to the consequence of a delay. Inventory availability and a monthly report have different requirements. Define an acceptable delay and how staff can tell whether information is current. Do not promise real-time behaviour when a connected service only provides periodic exports or delayed updates.
Prepare for retries and duplicates
Connections fail, and services can deliver the same event more than once. Identify repeated events so a retry does not create a second transaction. Record attempts and outcomes in a way staff can investigate. Distinguish a temporary failure from a record requiring correction. Error handling is part of the integration itself, not an optional task after the main transfer works.
Confirm access and operating charges
Check that API access or export features are available on the organisation’s service plan. Identify account owners, permissions and approval steps before promising a delivery date. Request limits and usage fees may affect scheduling and ongoing costs. Keep credentials out of public code and document who replaces access when a provider or staff member changes. Test the required operations with appropriate non-production data.
Verify the business result
A successful API response does not prove that the complete workflow is correct. Compare records on both sides and review identifiers, totals and important states. Agree on a reconciliation process for missed or conflicting updates. A useful integration gives the business a way to detect and repair differences, instead of allowing errors to accumulate silently behind an apparently successful connection.
Your practical checklist
- Record ownership rules
- Field and identifier mapping
- Agreed update timing
- Retry and duplicate-event handling
- Access, costs and reconciliation
