A schedule line of the schedule line type Request defines the quantity of the product that is expected at a certain date/time. For one purchase order item there can be several request schedule lines with various dates/times and quantities. The request schedule lines are defined by the customer.

For a subcontract order, in addition to the quantity and date/time of the product, a request schedule line can also contain one or more component requirements. A component requirement specifies which quantity of a subcontracting component will probably be required to produce the ordered quantity of the end product. If a co-product accrues during production, the confirmation schedule line also contains a component requirement with the negative quantity of the co-product.

In addition to the requested quantity, a request schedule line contains the goods receipt quantity and the open quantity. The goods receipt quantity is the quantity that the customer has already received. The customer sends the goods receipt in the purchase order schedule line to SAP SNC. The open quantity is the quantity that the supplier has not yet delivered. SAP SNC determines this quantity automatically. For more information, see Update of GR Data in the Purchase Order.

The supplier creates a schedule line of the schedule line type Confirmed for an item in SAP SNC purchase order collaboration, either manually or by sending a purchase order with confirmation data from his or her back-end system to SAP SNC. A confirmation schedule line determines the quantity of the product that the supplier can deliver at a certain date/time. The supplier can create one or more confirmation schedule lines for an item. The confirmation schedule lines can differ in terms of number, quantities, and dates/times from the request schedule lines. In standard confirmation processing, a confirmation schedule line refers to the item, not to a specific request schedule line.

For a subcontract order, the supplier also specifies the component requirements of a confirmation schedule line that he or she actually requires to produce the ordered end product.

The supplier can only create confirmation data for an item if confirmation control permits it (see Confirmation Control).

SAP SNC automatically creates a schedule line of the schedule line type ASN-Confirmed for a purchase order if the supplier publishes an ASN for the purchase order item in SAP SNC. A schedule line of this schedule line type likewise refers to the item, not to a specific request schedule line.