Hi Christopher ,
Assume you have Create Status Flag with below formula
= If([Kumulierter Anteil]) > [Value A ] Then "A" Else If ([Kumulierter Anteil] Between([Value C ];[Value A ])) Then "B" Else "C"
A- Segment : Material count
=Count([Material1] Where ([Status]="A") ForEach([L01 Material Key]))
similarly to B and C.
A- Segment : Value
=Sum([gesamkbvert] Where ([Status]="A") In([L01 Material Key] ))