The hierarchy of a work breakdown structure can be automatically derived from the numbers of its WBS elements. You can enter new WBS elements at level 1 and then arrange them in the work breakdown structure by choosing Project-> Derive structure -> Execute. The WBS element with the shortest number is placed on level 1. Every further WBS element is then arranged in the subordinate hierarchy levels according to its number.
Editing screen: P-XXX-XX-XX
|WBS element number||Level||superior element|
If the hierarchy cannot be derived, the system ask you to check the structure. Choose Project -> Derive structure -> Check and you receive a message that gives you the reasons for the error.
The prerequisite for deriving a hierarchy is that you have maintained an editing mask in Customizing for the project definition and its WBS elements.
Prerequisites for successfully deriving a hierarchy: