Individual and Group average

[microbati]

Hello,

I have the following puzzle that I am trying to resolve and so far I was not able to find a good solution to it (DAX).

The raw data table looks like:

Name	Activities	Date
John	2	2019-07-07
John	3	2019-07-08
John	4	2019-07-12
Deanna	3	2019-07-08
Deanna	4	2019-07-09
Deanna	5	2019-07-11

I want to know the Average activities per day per "employee" so I have created two measures:

1- Worked days = DISTINCTCOUNT(Date)

2- Total Activities = SUM(Activities)

3- Avg Activities = Total Activities / Worked Days / DISTINCTCOUNT(Name) 

Which yield the expected results:

Name	Avg Activities	Total Activities	Worked days
John	3	9	3
Deanna	4	12	3

So far so good, now I want to calculate the Average activities per day per name of the team, you would say that the above is pretty simple, just remove the Name component and I should get the team average:

Avg Activities	Total Activities	Worked days	DISTINCTCOUNT(Name)
2.1	21	5	2

As you can see the average result of 4.2 is not the right one, it should be 3.5 (in this case I've simulated the data to be simple at the eye). 

This result is given by the way that Worked days counts the number of "active days" of each employee.

I think that a weighted average would work, but I have not been able to identify the right way to do it in PowerBI

[v-lili6-msft · Accepted solution]

hi, @microbati 

This looks like a measure totals problem. Very common. See this post about it
https://community.powerbi.com/t5/DAX-Commands-and-Tips/Dealing-with-Measure-Totals/td-p/63376

Also, this Quick Measure, Measure Totals, The Final Word should get you what you need:
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

For your case,  just try this formula:

Measure = var _table=SUMMARIZE(Table1,Table1[Name],"Avg Activities",[Avg Activities]) return
AVERAGEX(_table,[Avg Activities])

Result:

Best Regards,

Lin

[microbati]

Thank you!.

I've just combined your answer with an additional mesasure using HASONEFILETER to come out with a final table:

Now both totals and Team average show the right numbers.

[HotChilli]

Shouldn't your measures be :

worked days = COUNT(Table1[Date])

Avg Activities = [Total Activities] / [worked days]