Up to and including Release 3.0D, billing plans for milestone and periodic billing were created and maintained exclusively at item level. When making changes to documents across all items, however, a large amount of manual work was required. Due to the large number of manual changes, there was also a high risk of error.

As of Release 3.0E, you can define a billing plan at header level which is valid for all items assigned to it. The header billing plan is maintained at header level. Data copied to the assigned items cannot be changed in the items.