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## Weighted Average Calculation

Hi there,

I have reached a roadblock and seeking for help in calculating weighted average for the following data.

The Column Risk2 determines which products are in a risk category and is calculated as follows

``Risk2 = if(([Consumption]) > [Forecast],0,1)``

I suspect that there is a better way to calculate the ratio of "Risk" items for each subcategory (A-C). I tried using ALLSELECTED[GROUP] but some reason it didn't work.  Here is the calculated measure I used

``% = DIVIDE(sum([Risk2]), calculate(COUNT([Risk2]),ALLSELECTED([ITEMCODE])))``

And then the final result that I am trying to achieve is the weighted average
Group A has 50% weght,

Group B - 30%

Group C - 20%
and the remaining groups (D-F) are 0%.

I need to get the sum of % of each group multiplied by weight - 60*0.5 + 93.75*0.3 + 80*0.2 = 74.25

The current measure is a simple IF statement but that doesn't seem to work

``````Weighted % =
VAR FR =
DIVIDE(sum([Risk2]), calculate(COUNT([Risk2]),ALLSELECTED([ITEMCODE])))
RETURN
IF(MAX([GROUP] )= "A",FR * 0.5,
IF (MAX([GROUP]) = "B", FR * 0.3,
IF( MAX([GROUP]) = "C", FR * 0.2,
IF( MAX([GROUP]) = "D", FR * 0,
IF( MAX([GROUP]) = "E", FR * 0,
IF( MAX([GROUP]) = "F", FR * 0,FR * 0
))))))``````

Thank you 1 ACCEPTED SOLUTION  Super User

You need to provide a Row Context for this to work when there is more than one Group selected.

Try using:

``````Weighted % =
VAR FR =
DIVIDE(sum([Risk2]), calculate(COUNT([Risk2]),ALLSELECTED([ITEMCODE])))
RETURN
SUMX(VALUES([GROUP]),
SWITCH([Group]
, "A",FR * 0.5
, "B", FR * 0.3
, "C", FR * 0.2
, "D", FR * 0
, "E", FR * 0
,"F", FR * 0
,FR * 0
)
)``````

Also, you can probably use the AVERAGE function instead of DIVIDE, SUM and COUNT.

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Has this post solved your problem? Please Accept as Solution so that others can find it quickly and to let the community know your problem has been solved.

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www.excelwithallison.com

4 REPLIES 4  Super User

@rigosakhx That looks nice and elegant. Well done, and you're welcome. 🙂

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Has this post solved your problem? Please Accept as Solution so that others can find it quickly and to let the community know your problem has been solved.

I work as a Microsoft trainer and consultant, specialising in Power BI and Power Query.
www.excelwithallison.com  Helper I

Update - as per AllisonKennedy's replaced DIVIDE SUM COUNT with AVERAGE and created a separate measure for it.

% = AVG[Risk2]

Then I didn't need to use VAR in my final measure

Weighted % =
SUMX(VALUES([GROUP]),
SWITCH([Group]
, "A",AVG * 0.5
, "B", AVG * 0.3
, "C", AVG * 0.2
,AVG* 0
))

The code makes more sense and works as intended

Big thanks to AllisonKennedy  Helper I

Hi @AllisonKennedy
Thank you for this
It almost worked - but for some reason the sum equals to non weighted ratio  Super User

You need to provide a Row Context for this to work when there is more than one Group selected.

Try using:

``````Weighted % =
VAR FR =
DIVIDE(sum([Risk2]), calculate(COUNT([Risk2]),ALLSELECTED([ITEMCODE])))
RETURN
SUMX(VALUES([GROUP]),
SWITCH([Group]
, "A",FR * 0.5
, "B", FR * 0.3
, "C", FR * 0.2
, "D", FR * 0
, "E", FR * 0
,"F", FR * 0
,FR * 0
)
)``````

Also, you can probably use the AVERAGE function instead of DIVIDE, SUM and COUNT.

Check out my Olympics report with live stats - KUDOS much appreciated

Has this post solved your problem? Please Accept as Solution so that others can find it quickly and to let the community know your problem has been solved.

I work as a Microsoft trainer and consultant, specialising in Power BI and Power Query.
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