PowerBI - allow user to choose a date which will calculate all other dates

[Melimob]

Hi, I'm not sure how to pose this question hence my google searches have not returned what I need.
I know how I would do it in excel but stuck on how to do in PBI
I need:

1. user to select a 'CLOSE DATE' from a drop down
2. I have another *table with 'WAVE's 1 - 10 and duration of each wave e.g. 3.5 /4.5 /5 etc (this is months duration this may be decimal or whole as some need 'x and half months' and some are just full months)
3. Based on CLOSE DATE selected,
   1. all wave 1's will start 5 months after which should input value to 'START DATE' and add duration which would input value to 'END DATE
   2. all subsequent wave would then do END DATE (+ 1week buffer) = as start date. + duration to enter end date

*this table has a parent bucket so bucket A wave 1 may have a different duration to bucket B wave 1 hence I need to consider this column.
*MON's as start dates // FRI's as end dates (just to add some more complexity

Example:

Close date selected = 1JAN25 + 5months = MON 2 JUN 25...
Buffer = wave 2 onwards would have 1 week buffer to calculate next wave Start dates

BUCKET	WAVE	DURATION (Months)	START DATE	END DATE
A	1	3.5	MON 2 JUN 25	FRI 12 SEP 25
B	1	4.5	MON 2 JUN 25	FRI 17 OCT 25
A	2	3.5	MON 22 SEP 25	FRI 09 JAN 26
B	2	4.5	MON 27 OCT 25	FRI 13 MAR 26

​

Any guidance would be appreciated if not, I will do in excel.

thank you!

 

[Matt Allington]

You should load a disconnected date table into the model along with the data table you show above (first 3 columns). By not connecting the 2 tables, they will operate Independently.

Add a slice to the date column of the date table to capture the user selection. You can write DAX to then leverage that input. Eg
Selection = max(calendar[date])
End date = Selection + max(data[duration])*30