I want to use DAX way (learner in DAX though). Here is the scenario: I have 3 Parameters IN (new), OUT (resolve), and No_of_Days (by when). Also, Total_Open (EoD) (Card Display) The underlying formula: No_of_days = Total_Open / (Out-IN) (eg. IN-5, OUT-8 then No_Of_Days= 10 / (8-5) =3.3 ~~4 ; or IN-5, No_Of_Days=3 then OUT= (10/3 )+5) I have a total no of issues (10) open in my bucket (Today). I want to achieve 3 scenario dynamically: 1. By when my open issues become ZERO (0), by changing values of 2 Selected parameters (IN, OUT) by user. 2. What value of OUT would be, to make issues ZERO (0), by changing values of 2 Selected parameters (IN, No_Of_Days) by user. 3. What value of IN would be, to make issues ZERO (0), by changing values of 2 Selected parameters (OUT, No_Of_Days) by user. 4. Also, I want to provide values for 2 parameters ONLY from the 3 parameters and want to get value of 3rd one ONLY. Can we able to restrict user able to Select only 2 parameters...? Please help.