Slow Dax Measure for Employee Turnover

[dcrow5378]

Hello,
I have a few dax measures that are calculating employee turnover rates.  The problem is that it takes over a minute for the visuals/tables to render if the turnover measure is used.  I wonder if anyone can take a look and see any glaring issues.  Thanks in advance for any assistance.  The data set is only around 9k rows.

Turnover =
IFERROR ( [Termed] / [AVG Emps], BLANK () )

----------------------------------------------------------------------

Termed =
CALCULATE (
    COUNT ( Turnover[Employee ID] ),
    FILTER (
        ALL ( Turnover[TermDate] ),
        Turnover[TermDate] >= MIN ( 'Date'[Date] )
            && Turnover[TermDate] <= MAX ( 'Date'[Date] )
    )
)

----------------------------------------------------------------------

AVG Emps =
AVERAGEX ( ALLSELECTED ( 'Date' ), [Employee Count] )

----------------------------------------------------------------------

Employee Count =
SUMX (
    GENERATE (
        CALCULATETABLE (
            SUMMARIZE (
                Turnover,
                Turnover[Hire Date],
                Turnover[TermDate],
                "Rows", COUNTROWS ( Turnover )
            ),
            ALL ( 'Date' )
        ),
        INTERSECT (
            DATESBETWEEN ( 'Date'[Date], Turnover[Hire Date], Turnover[TermDate] ),
            LASTDATE ( 'Date'[Date] )
        )
    ),
    [Rows]
)

[AlexisOlson]

It's not surprising that GENERATE inside of SUMX inside of AVERAGEX is slow.

Rewriting [Employee Count] is what I'd recommend. You can probably make it much simpler. Maybe something more like [Termed]?

Employee Count =
VAR _MinDate = MIN ( 'Date'[Date] )
VAR _MaxDate = MAX ( 'Date'[Date] )
RETURN
    CALCULATE (
        COUNT ( Turnover[Employee ID] ),
        FILTER (
            ALL ( Turnover[TermDate] ),
            ISBLANK ( Turnover[TermDate] )
                || Turnover[TermDate] >= _MinDate
        ),
        Turnover[HireDate] <= _MaxDate
    )

[dcrow5378]

I tried this and the numbers are coming out much too low.

[Kucrapok]

Hi @dcrow5378,

1) Termed measure
Is there a specific reason why you need to explicitly filter the dates with MIN and MAX? Don't you have a relationship between  Turnover[TermDate] an Date[Date]?

2) Employee Count
What are you trying to accomplish here?
Like @amitchandak said, show us the Data and the model and explain to us with this measure should represent and what is the expected result. There's probably a better way to code this.

Also, its really not best pracetice to use SUMMARIZE to do calculation. You should replace the syntax to :

ADDCOLUMNS(
	SUMMARIZE(
	    Turnover,
	    Turnover[Hire Date],
	    Turnover[TermDate]
	),
	"Rows", CALCULATE( COUNTROWS ( Turnover ))
)

Most likely, the problem is  

[littlemojopuppy]

Hi @dcrow5378 

Here are some measures I wrote for my job...

Headcount = 
VAR EveryoneHired =
    FILTER ( Employees, Employees[DateStarted] <= MAX ( 'Calendar'[FullDate] ) )
VAR TerminatedEmployees =
    FILTER (
        Employees,
        Employees[Active] = FALSE ()
            && Employees[DateTerminated] <= MAX ( 'Calendar'[FullDate] )
    )
VAR ActiveEmployees =
    EXCEPT ( EveryoneHired, TerminatedEmployees )
RETURN
    COUNTROWS ( ActiveEmployees )



Hires = 
VAR NewHires =
    CALCULATE (
        DISTINCTCOUNT ( Employees[EmployeeID] ),
        USERELATIONSHIP ( 'Calendar'[FullDate], Employees[DateHired] )
    )
VAR Rehires =
    CALCULATE (
        DISTINCTCOUNT ( Employees[EmployeeID] ),
        NOT ( ISBLANK ( Employees[DateRehired] ) ),
        USERELATIONSHIP ( 'Calendar'[FullDate], Employees[DateRehired] )
    )
RETURN
    NewHires + Rehires


Terminations = 
CALCULATE (
    DISTINCTCOUNT ( Employees[EmployeeID] ),
    Employees[Active] = FALSE (),
    USERELATIONSHIP ( 'Calendar'[FullDate], Employees[DateTerminated] )
)


Median Tenure = 
VAR EveryoneHired =
    FILTER ( Employees, Employees[DateStarted] <= MAX ( 'Calendar'[FullDate] ) )
VAR TerminatedEmployees =
    FILTER (
        Employees,
        Employees[Active] = FALSE ()
            && Employees[DateTerminated] <= MAX ( 'Calendar'[FullDate] )
    )
VAR ActiveEmployees =
    EXCEPT ( EveryoneHired, TerminatedEmployees )
RETURN
    MEDIANX ( ActiveEmployees, YEARFRAC ( Employees[DateStarted], TODAY () ) )


Turnover Rate = 
VAR PastYear =
    CALCULATETABLE (
        VALUES ( 'Calendar'[CalendarWeekEnd] ),
        DATESINPERIOD ( 'Calendar'[FullDate], MAX ( 'Calendar'[FullDate] ), -1, YEAR ),
        REMOVEFILTERS ( 'Calendar'[FullDate] )
    )
VAR WeeklyAmounts =
    CALCULATETABLE (
        ADDCOLUMNS (
            PastYear,
            "WeeklyHeadcount", [Headcount],
            "WeeklyTerminations", [Terminations]
        ),
        REMOVEFILTERS ( 'Calendar'[FullDate] )
    )
VAR AverageWeeklyHeadcount =
    AVERAGEX ( WeeklyAmounts, [WeeklyHeadcount] )
VAR TotalTerminations =
    SUMX ( WeeklyAmounts, [WeeklyTerminations] )
RETURN
    DIVIDE ( TotalTerminations, AverageWeeklyHeadcount, BLANK () )

 Part of why your measures are so slow is using the SUMMARIZE function.  Try to avoid using that function...

These measures are for the data model I created at work.  But you should be able to follow the logic and implement in your model.  Hope this helps!

[dcrow5378]

Thanks!  I'll give these a shot and let you know how it goes.

[amitchandak]

@dcrow5378 , Can you explain these formulas. Can you share sample data and sample output in table format? Or a sample pbix after removing sensitive data.

refer if the approach on this blog can help

https://community.powerbi.com/t5/Community-Blog/HR-Analytics-Active-Employee-Hire-and-Termination-tr...