Help with Weighted Moving Average for delay delivery

[gianma78]

Dear Community,

hope you can assist. I am struggling with finding the correct way to calculate in Power Bi the Weighted Moving Average for delay delivery. 
Here is the case, assuming that we are running different project, and for each project we have expected delivery date. If that date is missed we have delay. Need now to calculate the weighted moving average for this delays in PBI.

Is that possible? 

Thanks for help!

[gianma78]

Hi Ryan,
apologies for the late reply, really sorry for that. 
Please see below a better example:

I would like to calculate in DAX the weighted moving average of last 6 periods:

avg=(M1*1+M2*2+M3*3+M4*4+M5*5+M6*6)/21

(M1: 6 months ago, M2: 5 months ago, M3: 4 months ago, ..., M6: previous month).

Each month can have no feedback, one feedback or more.

Therefore I need first aggregate the feedback received per month and average them.

Expected result is below

wt	Row Labels	Average of Feedback	wma
1	Jan-22	8.00
2	Feb-22	10.00
3	Apr-22	9.00
4	Aug-22	10.00
5	Sep-22	10.00
6	Oct-22	9.00	9.48
	Nov-22	10.00	9.67
	Dec-22	3.00	7.76
	Feb-23	10.00	8.19
	Aug-23	7.50	7.86
	Sep-23	8.00	7.79
	Oct-23	9.00	8.10
	Jan-24	2.00	6.40
	Feb-24	8.00	6.81
	Mar-24	10.00	7.55
	Apr-24	9.00	8.00
	May-24	9.00	8.38
	Jun-24	9.67	8.90

where wma is =SUMPRODUCT(C2:C78,$A$2:$A$7)/SUM($A$2:$A$7)

I have tried this solution, but it does not return expected result

Test_wma =

var current_month = MAX('Feedback'[Date])

var m1 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = edate (current_month,-1))

var m2 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = EDATE(current_month, -2))

var m3 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = EDATE(current_month, -3))

var m4 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = EDATE(current_month, -4))

var m5 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = EDATE(current_month, -5))

var m6 =

CALCULATE(AVERAGE('Feedback'[Rating]), 'Feedback'[Date] = EDATE(current_month, -6))

var wma = ((m6 * 1) + (m5 * 2) + (m4 * 3 ) + (m3 * 4 ) + (m2 * 5) + (m1 * 6)) /21

RETURN wma

Any suggestion is highly appreciated!

Many thanks!

[Ashish_Mathur]

Hi,

PBI file attached.

Hope this helps.

[foodd]

Hello @gianma78 , as @ryan_mayu has asked , please help with the following:

.
Please provide your work-in-progress Power BI Desktop file (with sensitive information removed) that covers your issue or question completely in a usable format (not as a screenshot). You can upload the PBIX file to a cloud storage service such as OneDrive, Google Drive, Dropbox, or to a Github repository, and then share a file’s URL.

https://community.fabric.microsoft.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-...

Please show the expected outcome based on the sample data you provided.

https://community.fabric.microsoft.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447...

This allows members of the Forum to assess the state of the model, report layer, relationships, and any DAX applied.

[ryan_mayu]

could you pls provide some sample data and expected output?

[gianma78]

Hello Ryan, sorry for the late reply. In the meantime, requestor changed the specifics for this calc.

What we aim to obtain is the weighted moving average per scores, and the moving should be based on a fix amount of months (or rating received). 

Assuming the following example

Date of Delivery	Project	Rating
06/2023	P23_001	7
06/2023	P23_002	5
08/2023	P23_003	9
09/2023	P23_004	8
12/2023	P23_005
01/2024	P24_001	6
01/2024	P24_002	9

It is a sample of the table I have, I can calculate the moving average as following DAX

"CALC Rating Moving Avg =

VAR _max_date = ENDOFMONTH('Calendar'[Date])

VAR _min_date = EDATE(_max_date,-6)

VAR _avg = CALCULATE(AVERAGE('Projects Log '[Feedback]),'Calendar'[Date] > _min_date && 'Calendar'[Date] <= _max_date)

RETURN _avg "

Any chance to have the weighted moving avg to have more emphasys to the recent Project delivered (guess I need to create the table of weights which is rolling on monthly basis)? And, if no rate is received, then skip the project from calculation 

Any hint would be highly appreciated

[ryan_mayu]

what's the expected output basd on the sample data you provided?