Creating a measure that takes the average for future events

[phjz]

Hey guys,

I have no clue what to do here:

I have a table which calculates the average amount of sales by month, hour, category and title like this:

Month name	Hour	Category	Title	Avg. Am. Sales
February	13	1	A	1
February	19	1	B	2
February	17	1	C	2
February	14	1	A	1
March	13	2	A	1

The measure "average amount of sales" refers to a column in a table and is defined as:

Average amount of sales =CALCULATE(AVERAGE(SALES[SALES]),ALL(Calendar[Date]))

 So far so good. But now I want to use these averages as a forecast for future dates (incl. time). I created a table like this:

Date+Time	Category	Title	Forecast Am. Sales
10.02.2024 13:30	1	A	1
27.03.2023 13:45	2	B	1
01.02.2023 17:01	1	C	2

So, when I put in the measure, it deletes all future entries and does only show sales of the past.

For sure, this is exactly what is meant to happen, but I have absolutely no idea how to create a new measure that calculates an average for past amount sales and uses it as a forecast for a future date and time.

Could you help me out here? Thanks a lot! 

[lbendlin]

But now I want to use these averages as a forecast for future dates (incl. time)

Which forecast methodology are you planning to apply?  Do you care about seasonality? Do you care about weekdays/workdays/holidays? DST?

[phjz]

Thanks for your reply. I think that sounds really interesting and I would try if this makes sense for my model. But as I even fail with just averages for future dates I thought that would be the first step of understanding.

In the meantime I tried a few more measures and when I refer to columns like Date+Time (like ALL(SALES[Date+Time])) it creates Dates in the future that weren't in the original table... I think this ALL-function doesn't work for me here...