Picture a machine shop. Call it "Precision Aero"; it is not a real company, and this is a scenario built from the assessment requirements rather than from any customer of ours. Its CEO thought they were ready. They had the firewalls. They had the encrypted servers. They even had a shiny new tablet at the front desk where visitors typed in their names.
Then the auditor arrived.
He didn't ask for the server logs first. He walked to the front desk, pointed at the "Visitor Management" app, and asked one question:
"How do you verify that the 'John Smith' who signed in ten minutes ago isn't on the Consolidated Screening List?"
The Office Manager shrugged. "We check IDs."
The auditor smiled, the kind of smile that costs money. "Show me the time-stamped proof of that check against the federal database for every visitor in the last six months."
Silence.