Calculating Average from a measure

[analyst123]

Hello,

I have a dataset where I am trying to find the average of a measure to show it as a card on my dashboard. 

I have used the following measure code to get the time duration between two dates: 

DOWNTIME (MINUTES) = SUMX('Source', CALCULATE(

DATEDIFF(MIN(Source[APPEARED]), MIN(Source[DISAPPEARED]), MINUTE) +

(SECOND(MIN(Source[DISAPPEARED])) - SECOND(MIN(Source[APPEARED]))) / 60

))

I need to calculate the average of this duration based on the count of 'message text'. 

I tried using the following formula:

Measure = AVERAGEX(VALUES(Source[MESSAGE NUMBER]), CALCULATE(

DATEDIFF(MIN(Source[APPEARED]), MIN(Source[DISAPPEARED]), MINUTE) +

(SECOND(MIN(Source[DISAPPEARED])) - SECOND(MIN(Source[APPEARED]))) / 60))

But it does not give me the accurate value. 

 This is an example of the layout:

Here, the average should be 38/23 = 1.65, but instead the average time is 1.25 minutes.

[v-yohua-msft · Accepted solution]

Hi, @analyst123 

I create a sample table:

Then create a new measure and try the following DAX expression:

AverageDowntime = 
DIVIDE(
    SUMX(VALUES('Table'[Message number]), CALCULATE(
        DATEDIFF(MIN('Table'[APPEARED]), MIN('Table'[DISAPPEARED]), MINUTE) +
        (SECOND(MIN('Table'[DISAPPEARED])) - SECOND(MIN('Table'[APPEARED]))) / 60
    )),
    DISTINCTCOUNT('Table'[MESSAGE NUMBER])
)

Here is my preview:

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Best Regards

Yongkang Hua

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[bhanu_gautam]

@analyst123 , Try below DAX

Average Downtime (Minutes) =

DIVIDE(

    SUMX(

        VALUES(Source[MESSAGE NUMBER]),

        CALCULATE(

            DATEDIFF(MIN(Source[APPEARED]), MIN(Source[DISAPPEARED]), MINUTE) +

            (SECOND(MIN(Source[DISAPPEARED])) - SECOND(MIN(Source[APPEARED]))) / 60

        )

    ),

    COUNTROWS(VALUES(Source[MESSAGE NUMBER]))

)