Project Coding Mask and WBS numbering
Our project masks are Z10-XXX-XXX-XXXX-XX-XX
we are creating projects as Z10-001, Z10-002 etc
When we create a WBS element we want our 1st level WBS element should be Z10-001-001, Z10-001-002......Z10-001-999.
and our 2nd level WBS element should be Z10-001-001-0001, Z10-001-001-0002... etc..
To do this do we need to include a validation in Project profile masterdata.
Is it possible with standard customizing or do we need to write an user exit.
Please suggest me.