Bring representative data
Prepare sanitized products, variants, warehouses and orders. Decide which system is authoritative for inventory and order status. Do not let two systems change the same field without a conflict rule.
Run eight different orders
Test a normal order, a multi-item order, a partially unavailable order, a split shipment, a cancellation, a partial refund, an exchange and an invalid address. Check totals, currencies, inventory and tracking numbers. Record the input, expected result and actual result for each.
Interrupt synchronization in a test environment
Resume it and look for duplicate orders or stale data replacing newer states. Check whether the error can be traced to a particular order. Ask about latency, rate limits and retries; request an explanation of the concrete failure rather than a general promise of automation.
Test handover and exit
Let the people who will operate the system complete a day’s tasks independently. Document access, field mappings and scheduled jobs. Verify product, order and inventory exports. Separate implementation, training, integration and change-request costs in the proposal.
