DAX: S-Curves, or cumulative counts
This can be used for project S-Curves.
S-Curve Quantity = 
VAR thisDate = MAX('Calendar'[Date])
RETURN
CALCULATE(
    [Quantity],
    FILTER(
        ALLSELECTED('Calendar'),
        [Date] <= thisDate
    )
)
This can be used for project S-Curves.
S-Curve Quantity = 
VAR thisDate = MAX('Calendar'[Date])
RETURN
CALCULATE(
    [Quantity],
    FILTER(
        ALLSELECTED('Calendar'),
        [Date] <= thisDate
    )
)