This article contains an outline of the business cycle from the supplier/customer perspective. Each item also includes a link that will take you to an article with a practical example.
Received customer inquiry
Creating an issued quote
After the issued quote is accepted, the next step is receiving => a purchase order
If the goods are not available, the next step is => an inquiry to the supplier
Received quote from the supplier
If you accept the price, the next step is => creating a purchase order (with the option to order up to the minimum stock level).
Subsequent receipt of goods using => a goods receipt and purchase invoice
If the goods from the customer's purchase order are available, the next step is => issuing an invoice and a delivery note
Bank payment of the issued and received invoice