Use
This function enables you to assign several substances to a report. The report is then generated for a particular substance and can then be used in report shipping for that substance and all assigned substances.
The number of reports required in the R/3 System is thus reduced.
Features
However, changes are not entered automatically in all existing report versions.

If substance data assigned to a report is changed, an entry is not automatically made in the worklist. You must check if the assigned report fits with the changed data.
You must also check if the assignment is valid if you change the substance for which the report was generated.
Activities
Assigning Substances to a Report