i've managed to solve this by keeping the Ticket-ID as a Row. Then i've added totals via Result Manipulation. This gives a correct calculation. This calculation is then used in a pie-chart.
Andrei, Yes, sure. It consists of 3 parts. What you see in te above example is this one IF (SUM(Opgelost binnen SLA) = 1) THEN 1 ELSE NULL ENDIF Where "Opgelost binnen SLA" is calculated by a sw...