Follow the information
Choose a business process and trace the information it creates, uses, and hands to another team. Capture which system is authoritative for each part.
This often reveals duplicate entry or unclear ownership that a new connector alone would not resolve.
Make exceptions visible
Record what happens when information is late, incomplete, or rejected. Teams need a clear way to notice and recover from failed handoffs.
Consider access permissions, audit needs, and how integrations will be monitored after launch.
Sequence the work
Prioritise a bounded integration that validates the important assumptions. Document interface contracts and responsibilities so future changes are easier to reason about.
Plan for support and ownership as part of delivery, not as a separate clean-up task.