Check the period and last update
Establish whether the report uses stay, booking or payment dates. Verify the last successful data transfer. A missing day should not automatically be read as zero sales.
Reconcile available inventory
Changes in available rooms affect occupancy and RevPAR. Agree how renovations, house-use rooms and closures are treated. Compare the same definition of availability in both systems.
Define room revenue
Check currency, tax treatment and package allocation. If one system includes breakfast in room revenue and another does not, ADR will differ even with identical bookings.
Check duplicates and statuses
Review cancellations, no-shows, date changes and repeated imports. Booking count is not sold room-night count. Trace a sample from the PMS through to the report.
Document the mismatch
Give support the property, period, PMS, integration type, expected and actual result, and transfer time. Use an anonymised sample rather than unnecessary guest personal data.
Before your weekly meeting, check date completeness, inventory, revenue, statuses and the last update.