When a sales order is placed, the availability is checked and the material is reserved. In FI the creditworthiness of the customer is checked. No postings are generated, but the profit center is determined at this point. At goods issue, the change of the inventory costs is posted to accounting and controlling. At billing the revenues are posted. If the profitability analysis is in use, the sales transaction is valuated with products costs and eventual calculatory costs. A receivable is posted. When the customer pays, the payment is recorded in accounting. In case of no payment the customer is dunned and this is recorded in credit control.