Average Age of employees by year dynamically

[Anonymous]

Hey, Guys, I have been facing some problems in calculating the average age of employees by year in my Power BI and I would like to ask some help.

I don't know how to dynamically calculate all the ages that the employees had in the year in order to get the average in that year and to check the evolution. I don't know how to add a virtual column based on the row context for the birthday, and the graph year at the same time. Above you can see that it isn't correct because in 2000 the people that are still enrolled had 19 years less than today, and I can't solve.

Does anyone have some idea on how to solve this?

The Data Set can be download here:

Average Age by Year (Data Set)

Thank you so much for your help!

[OwenAuger · Accepted solution]

@Anonymous 

Reuploaded your pbix here.

I had a look at your PBIX and I rewrote the Age (Dynamic) measure like this and put it in the Tornado Chart:

Age (Dynamic) = 
// Calculated average age of employees who are still 'active' as at the max selected date
// (if filtered by Year, this will be as at 31 December)
// Age is calculated as at the max selected date
VAR MaxDate =
    MAX ( 'Calendar'[Date] )
VAR MaxYear =
    YEAR ( MaxDate )
RETURN
    CALCULATE (
        AVERAGEX ( Employees, MaxYear - YEAR ( Employees[Birthday] ) ),
        ALL ( 'Calendar' ),
        Employees[AdmissionDate] <= MaxDate,
        OR (
            Employees[Resignation Date] > MaxDate,
            ISBLANK ( Employees[Resignation Date] )
        )
    )

After doing some checks it looks to be giving the correct result.

The logic is:

1. Grab the MaxDate and MaxYear from the Calendar filter (this will be a year-end date on the Tornado)
2. Iterate over the Employee table with AVERAGEX to get the average age, subject to these filters (applied within CALCULATE):
   1. Remove 'Calendar' filters otherwise we will be using the 'Calendar' table to filter Admission Date
   2. Admission Date must be on or before MaxDate
   3. Resignation Date must be after MaxDate or blank

Does this look like it's working?

Regards,

Owen

[Anonymous]

Hey, @OwenAuger!

I did the Age (Dynamic) that you rewrote and it's working exactly as I wanted to! Thank you so much for your time and your help.

I have just one question: Why did you use All( 'Calendar')? Was it necessary?

Thank you again!

[OwenAuger]

That's good news 🙂

Yes, the ALL ( 'Calendar' ) is necessary. The reason is that there is a relationship between Admission Date and the 'Calendar' table. If we didn't clear 'Calendar' filters for the purpose of the calculation, you would see average age only for employees who had Admission Dates within the year.

Try removing ALL ( 'Calendar' ) and you will see the difference.

Regards,

Owen

[Artm]

Hello all,

Is it possible to make the same but showing the average age not only by years but by months as well?

I have a visual calendar with years and months and want to see dynamic change of avg.age by months.

Thanks.