It is to make the connection between the order of an item and the orders of lower-level items consisting of the item, and from the constituent item's standpoint it refers to the connection with the orders of parent or upper-level items. For the purpose of making an Order Connection, each order has its parent order number and upper-level order numbers set in addition to (its own) order number. Moreover, Pegged Requirements are used to make an Order Connection.

Related term: Pegged Requirements