Start with a repeated hand-off
Look for the point where information gets passed along by hand. For example: approved time going into invoices, event payments updating a ledger, or a customer chat creating a record.
Use an existing product where it fits
HR Portal already links leave, timesheets and invoicing. Events Portal links member entries to payment records. For anything else, we build it.
Keep exceptions visible
Decide upfront what happens when a record is incomplete, a payment notification arrives twice or a connected service goes down: who deals with it, and what gets logged.