Calculate Last Week's Value for a Particular Line of Business

[KCroninKrein]

Hi everyone! 

I have weekly revenue data for 3 lines of business, and I am trying to calculate for each line of business what the change in revenue is week-to-week. I suspect that I could do this by splitting the data into 3 tables (one per Line of Business), but I would rather keep the data together in one table to simplify the model. 

Below is my sample (dummy) data:

Week	Line_Of_Business	Opportunity_Revenue
8/12/2019	A	123
8/12/2019	B	456
8/12/2019	C	789
8/19/2019	A	120
8/19/2019	B	446
8/19/2019	C	782
8/26/2019	A	131
8/26/2019	B	445
8/26/2019	C	788
9/2/2019	A	125
9/2/2019	B	455
9/2/2019	C	800
9/9/2019	A	134
9/9/2019	B	446
9/9/2019	C	800
9/16/2019	A	137
9/16/2019	B	446
9/16/2019	C	803

Right now, I am using the following DAX to calculate the Previous_Week_Revenue for each Line of Business:

Previous_Week_Revenue =
VAR Pre_date =
    CALCULATE (
        MAX ( 'Sales Pipeline'[Week] ),
        'Sales Pipeline',
        'Sales Pipeline'[Week] < EARLIER ( 'Sales Pipeline'[Week] )
    )
RETURN
    CALCULATE (
        SUM ( 'Sales Pipeline'[Opportunity Revenue] ),
        'Sales Pipeline',
        'Sales Pipeline'[Week] = Pre_date
    )

However, this code is giving me the total revenue per week, rather than for the particular line of business. 

Current Result: 

Week	Line_Of_Business	Opportunity_Revenue	Previous_Week_Revenue
8/12/2019	A	123
8/12/2019	B	456
8/12/2019	C	789
8/19/2019	A	120	1368
8/19/2019	B	446	1368
8/19/2019	C	782	1368
8/26/2019	A	131	1348
8/26/2019	B	445	1348
8/26/2019	C	788	1348
9/2/2019	A	125	1364
9/2/2019	B	455	1364
9/2/2019	C	800	1364
9/9/2019	A	134	1380
9/9/2019	B	446	1380
9/9/2019	C	800	1380
9/16/2019	A	137	1380
9/16/2019	B	446	1380
9/16/2019	C	803	1380

And my desired output looks like this: 

Week	Line_Of_Business	Opportunity_Revenue	Previous_Week_Revenue
8/12/2019	A	123
8/12/2019	B	456
8/12/2019	C	789
8/19/2019	A	120	123
8/19/2019	B	446	456
8/19/2019	C	782	789
8/26/2019	A	131	120
8/26/2019	B	445	446
8/26/2019	C	788	782
9/2/2019	A	125	131
9/2/2019	B	455	445
9/2/2019	C	800	788
9/9/2019	A	134	125
9/9/2019	B	446	455
9/9/2019	C	800	800
9/16/2019	A	137	134
9/16/2019	B	446	446
9/16/2019	C	803	800

It seems like there should be a way to tell the model to look at the previous week value and filter on the row that matches the Line of Business value, but I'm new to DAX and haven't quite figured out where to put this additional context. How would y'all suggest I update my calculation?

Thank you!

[Ashish_Mathur]

Hi,

Please find attached my PBI file.

Hope this helps.

[Ritaf1983 · Accepted solution]

Hi @KCroninKrein 
Try to add a calculated column   with Dax formula:

PreviousDateRevenue = CALCULATE( SUM('Table'[Opportunity_Revenue]), FILTER( 'Table', 'Table'[Line_Of_Business] = EARLIER('Table'[Line_Of_Business]) && 'Table'[Date] = EARLIER('Table'[Date]) - 7 ) )

If this post helps, then please consider Accepting it as the solution to help the other members find it more quickly