I will try to explain the problem with my bad english. 😉
You can see a Pivot table with the Dimensions: Abteilung(Department), Art (Projekt Descrption), Mitarbeiter (Employee), and Datum (Date).
There is a column "Kapa" this is the daily cpacity of hours for the employee = 7.7 hours
The summary in the screenshot for Kapa is 315,7 hours but this is wrong because the employee GRUMET works at one day, for exampe 08.01.2020 at four Project so this formular counts for every Project and day (08.01.2020) 4x7.7 hours!