IMPORTANT. If optional possibility to manage manufacturing process by technological operations should be used, then the corresponding Routing per Operations should be created for each unique technological process and assigned to the proper Product Structure. At least one valid Routing Version with "Approved" Status should exist before creation of Production Order for corresponding Part. In order to describe correctly Operations in the Routing, the corresponding Basic Data (set of Calendars, Resources, Work Cells etc.) should be prepared in accordance with available technological equipment and actual manufacturing staff.