How to calculate new faults, existing faults, ... , Is PowerBI the right place for this data problem

[FilipVDR]

Hello,

I'm reading a table of fault id's which has start and ending dates.

AssetID	FaultID	Start	Close
101	1	1/08/2023	4/08/2023
102	2	1/08/2023	1/08/2023
103	3	1/08/2023

Business wants to see graphs where they can see how many new, existing and closed faults they have open for each day/week/month.

So i guess I should end up with someting like this? For now i have about 40.000 faultID's but this could become 4million rows.

Is there a way to do this with PowerBI? I tried some dax measures but i already ran out of memory on my Laptop.

Or is there a better way in PowerQuery?

Date	AssetID	FaultID	NewFault	ExistingFault	ClosedFault
1/08/2023	101	1	1	0	0
2/08/2023	101	1	0	1	0
3/08/2023	101	1	0	1	0
4/08/2023	101	1	0	0	1
1/08/2023	102	2	1	0	1
1/08/2023	103	3	1	0	0
2/08/2023	103	3	0	1	0
3/08/2023	103	3	0	1	0
4/08/2023	103	3	0	1	0

[v-yueyunzh-msft · Accepted solution]

Hi , @FilipVDR 

Thanks for your sample data first. Here are the steps you can refer to . My test data is the same as yours.My Table name is 'Table'.

(1)We can create a blank query in Power Query Editor:
And then we can put this M code in the "Advanced Editor":

let
    Source = Table,
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"AssetID", Int64.Type}, {"FaultID", Int64.Type}, {"Start", type date}, {"Close", type date}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each try  List.Dates([Start], Duration.Days( [Close] -[Start])+1   ,#duration(1,0,0,0))   otherwise
List.Dates([Start], Duration.Days(List.Max(Table[Close])  -[Start])+1   ,#duration(1,0,0,0)   )),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Start", "Close"}),
    #"Expanded Custom" = Table.ExpandListColumn(#"Removed Columns", "Custom"),
    #"Renamed Columns" = Table.RenameColumns(#"Expanded Custom",{{"Custom", "Date"}}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Renamed Columns",{{"Date", type date}})
in
    #"Changed Type1"

Then we can get the table like this:

Then we can apply the data to Desktop and then we can click "New Column " to create some calculated columns in Power BI Desktop:

NewFault = IF( CALCULATE( MAX('Table'[Start]) , 'Table'[AssetID]=EARLIER('Table2'[AssetID]) , 'Table'[FaultID]=EARLIER('Table2'[FaultID])) = [Date] ,1,0)

ExistingFault = var _close_date =  CALCULATE( MAX('Table'[Close]) , 'Table'[AssetID]=EARLIER('Table2'[AssetID]) , 'Table'[FaultID] =EARLIER('Table2'[FaultID]))

return
IF( [NewFault] =1, 0 , IF(_close_date=BLANK() ,1,  IF([Date] <_close_date,1,0)  ))

ClosedFault = var _close_date =  CALCULATE( MAX('Table'[Close]) , 'Table'[AssetID]=EARLIER('Table2'[AssetID]) , 'Table'[FaultID] =EARLIER('Table2'[FaultID]))

return
IF([Date] = _close_date ,1,0)

Then we can get the table you want to get :

Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

Best Regards,

Aniya Zhang

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

[FilipVDR]

Thanks, your solution works.

I have changed the duration to 7 days to have it week by week, day of day would give me too many records I think. 

[amitchandak]

@FilipVDR , Use this HR blog, but for existing (Active employee), use Strictly > and <

Power BI: HR Analytics - Employees as on Date : https://youtu.be/e6Y-l_JtCq4
https://community.powerbi.com/t5/Community-Blog/HR-Analytics-Active-Employee-Hire-and-Termination-tr...

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