A supersedure is a manually created relation that graphically displays the replacement (displays components that have been removed and the components that have been added to replace them) in context of parent assembly. Supersedures are created when defining engineering change, so that replacement can be displayed later on. It can be created for changes to part number (item id of part) or for changes to quantity, but not for changes in part revision.

Structure Change & Supersedure

To establish the supersedure relationship, old item revision is manually copied to Impacted Items folder and new item revision to Solution Items folder of change revision. Right click the item revision in Solution Items folder and choose Relate Solution Item to Impacted Item, to relate the replacement information, in case of multiple solution items. ...  Continue Reading