Inside
When they stop checking
There is one honest measure of trust inside a company, and nobody puts it on a slide. It is the number of people who no longer ask where your number came from.
It accumulates the same way everywhere I have worked. In the first months every figure marketing reports gets checked. Finance pulls its own export and asks why the revenue in the deck is not the revenue in the ledger. Somebody in operations asks whether the order count includes the ones that came back. Every question is fair, and every one of them costs a day.
Then the figures tie for a few months, and the checking quietly stops. Not by decision. Nobody announces that marketing's number is now the number. The reconciliation just does not happen, the question is not asked in the meeting, and the line goes upstairs unopposed.
That is the whole of it. Not the title, not a seat on a committee, not the size of the budget. A marketing lead's real authority is the count of questions they are no longer asked, and it is built at the speed of matching numbers, which is one month at a time.
It comes apart faster than that. One figure that does not tie, explained a week late, and the exports come back. There is no malice in it. Whoever stopped checking took a risk on your behalf and it did not pay, and they will not take it again for a year. After that, every number carries a day of proof, and the day comes out of the work.
Nobody in the building could tell you the month they stopped checking. Everybody can tell you the week they started again.