12 months rolling averge

[oilman]

Hello, i have calculation for Mean Distance between failure (MDBF) but need help to make a 12 months rolling average for MDBF. I understand i need a DAX formula in connection with my formula below.

NOF= Number of failures

My calculation for MDBF is: 

MDBF = if(sum([NOF])>0;sum(Distance])/sum([NOF]);sum([Distance]))

[themistoklis · Accepted solution]

@oilman

You can use the following formula:

Sales12M := CALCULATE (
    SUM([Distance]),
    DATESBETWEEN (
        Calendar[FullDate],
        NEXTDAY ( SAMEPERIODLASTYEAR ( LASTDATE ( Calendar[FullDate] ) ) ),
        LASTDATE ( Calendar[FullDate] )
    )
)

Best to add a customer calendar and then use the formula.

This sums the distance for the last 12 months. You can use the same formula for NOF and then divide the 2 measures.

Second option is described hon this link.

[oilman]

Thanks, that solved my problem