Cutoff errors are rarely exotic. They happen when shipping keeps moving after billing locks, or when IT applies a patch that reopens a period someone thought was closed. Financial auditing guidance for year-end audit preparation should treat timing as an operations problem first.
Publish a single map
One page: columns for warehouse, billing, GL, and IT change freeze. Rows for date and named owner. Circulate it two weeks early. If someone cannot see their name, they will invent a local schedule.
Sequence matters
Freeze physical movement before you freeze journals when inventory is material. The opposite order creates ghost shipments that only appear when auditors pick samples.
Protect a buffer day
Leave one business day between soft close and hard lock for cleanup journals that everyone pretends will not exist. Teams that skip the buffer invent weekend heroes.
Screenshot the locks
System timestamps beat memory. Capture the period-lock screen and store it with the TB used for the pack.
Module 1 of Year-End Audit Mastery drills this map with messy multi-system examples.