Average by Column then Percent Difference

[stark1687]

New PowerBI user here. 

I have a set of data of project spend and I am trying to get the averages based upon two columns "Event" and "Vendor". 

Then I want to compare actuals to %difference of the average. 

001967	$  3,694,483.24	CI	41371
002604	$  2,396,125.21	CI	37608
002605	$  1,219,674.86	CI	41371
003442	$      776,005.65	CI	41371
003457	$      883,514.22	CI	3394
003458	$  1,273,172.80	CI	3394
003462	$  1,606,554.29	CI	38528
003475	$  1,299,846.38	CI	3394
004153	$      512,749.13	CI	41371

Looking at this data the average across all vendors (by event bc there are lots of different events in the table) is  1,550,728.22  but for vendor 37608 it is 2,396,125.21 so it is 55% greater than the average. Indicating that this vendor is very expensive or the project went bad. 

In this way I want to show which vendors are costing more than the average cost to perform a work scope.

This can be done quickly in excel and pivot tables but we want the dashboard/interactive reports of Power BI.

I keep getting stuck on how to write the Average Measure to produced the desired resuts given that my table has lots of vendors for lots of differnet events. 

Could someone point me towards a good tutorial? 

[v-yuta-msft]

Hi stark1687,

Create a calculate column and try DAX like this:

Percentage =
CALCULATE (
    DIVIDE ( table[cost] - AVERAGE ( table[cost] ), table[cost] ),
    FILTER ( table, table[event] = EARLIER ( table[event] ) )
)

Regards,

Jimmy Tao

[stark1687]

Didnt quite work. 

My table has lots of different values for Event Type, Project and Vendor more like this. 

So for event CI the avg cost for vendor 3394 is 1,152,177.8, the avg for all vendors is 1,1518,13.97. So this vendor is pretty well aligned with the market. Whereas the avg for vendor 37608 is 2,396,125.21 which is way above. But I want to create a measure/column to do this analysis in the table that has lost of different vendors/events for each project. 

ProjectID	Sum of ActualCost	EventType	Vendor.1
MM003457	883,514.22	CI	3394
MM003458	1,273,172.80	CI	3394
MM003475	1,299,846.38	CI	3394
MM002604	2,396,125.21	CI	37608
MM003462	1,606,554.29	CI	38528
MM001967	3,694,483.24	CI	41371
MM002605	1,219,674.86	CI	41371
MM003442	776,005.65	CI	41371
MM004153	512,749.13	CI	41371
MM002632	2,035,097.14	HGP	3394
MM003384	2,293,902.88	HGP	3394
MM003390	6,977,007.28	HGP	3394
MM003412	2,410,819.81	HGP	3394
MM003429	6,320,683.18	HGP	3394
MM003441	5,393,296.40	HGP	3394
MM006737	2,708,156.58	HGP	3394
MM003433	5,649,589.79	HGP	38528
MM003492	1,426,222.69	HGP	38528
MM003482	745,867.94	HGP	41371

[Ashish_Mathur · Accepted solution]

Hi,

You may download my solution file from here.  Hope this helps.

[stark1687]

That worked thanks 

[Ashish_Mathur]

You are welcome.

[Ashish_Mathur]

Hi,

Paste the column titles with your data.  How does one know what is the info in that column without a title?

[stark1687]

Sorry didnt realize I missed the headers

Project	Cost	Event	Vendor Code
1967	$  3,694,483.24	CI	41371
2604	$  2,396,125.21	CI	37608
2605	$  1,219,674.86	CI	41371
3442	$      776,005.65	CI	41371
3457	$      883,514.22	CI	3394
3458	$  1,273,172.80	CI	3394
3462	$  1,606,554.29	CI	38528
3475	$  1,299,846.38	CI	3394
4153	$      512,749.13	CI	41371