MRP glossary TOP > Material Planning > Order Relationship
Order Relationship
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.
![mrp_062-1.jpg](http://www.asprova.jp/mrp/glossary/en/assets_c/2011/09/mrp_062-1-thumb-400x266-1327.jpg)
Related term: Pegged Requirements
Reference:JIT Business Research Mr. Hirano Hiroyuki