The following prerequisites must be fulfilled if you want to create a production order with co-products or by-products.

• The indicator Co-product must be activated in the material master of the main product (MRP area)

• The indicator Co-product must be activated in the material master of the co-product (MRP area)

• The co-product must be listed as an item in the bill of material of the main product

• On the Basic data tab page of the BOM item, the indicator Co-product must be activated in the field group General data.

• The by-product must be listed as an item in the bill of material of the main product

• The bill of material item must have a negative quantity (for example ‘1 -’).