Input values in Dimension filed

[Anonymous]

Hello,

I need to input values in the dimension field of a pivot table: the aim is to calculate the starting assembly date by subtracting the estimated assembly days from the end date, and I'd like to change the estimated days to allow some simulations.

I tried to use the InputSum(EstimatedDays), but QW gives me "Error in calculated dimension" (I guess becuse of the use of InputSum in a Dimension fields instead of in an Expression one); on the other hand, as you can see, I can't introduce a second Expression fields to avoid the undesired corruption of the Gantt diagram.

Any suggestion, pls?

Thank you.

N.