The rules are 1.7 and 1.8, wearing sales clothes. Approve sales orders and the posting permissions for sales documents are separate grants: the person who commits the company to an order need not be the person whose posting moves the stock and raises the receivable. Where work changes hands — an order awaiting approval, an approved waybill awaiting its invoice — the bell carries it to the next person's attention, and the cockpit's findings banner keeps the queues visible to everyone who watches them.
With auto-post on (the default), approving a waybill moves the stock in the same act, and approving an invoice raises the receivable at once — so the shelf and the ledger agree with the loading bay in real time, and the customer's exposure is never yesterday's. The discipline it demands is the one §1.8 names: the approver is the last human gate. If a posting is refused — the period is closed, a credit rule blocks the stage — the document falls back to draft with the reason in front of the approver, never half-posted.