topic Re: Need help to calculate average resolution time which excludes top and bottom 1% of values in DAX Commands and Tips

Need help to calculate average resolution time which excludes top and bottom 1% of values

Anonymous — Mon, 03 Oct 2022 12:11:16 GMT

Hi all,
I need to calculate average of resolution time which should exclude 1% extreme values means top and bottom 1% values.
Average of resolution time= (Resolved On Date - Created on Date) divided by total number of ticket count
So if I have 1000 resolved ticket , we should exclude the 10 tickets that have the shortest resolution time and the 10 tickets that have the longest resolution time.

I have tried using RANKX function to calculate top and bottom rank on resolution time(difference between resolved and created) but not able to get it right and also, how do I combine both top and bottom in final query.

TopRANK = RANKX (table,table[ResolutionTimeInHr])

BottomRANK = RANKX (table,table[ResolutionTimeInHr],,ASC)

Top 1% =
var top_find_rank=COUNTROWS (Table) * 0.01

RETURN COUNTROWS(FILTER(Table,Table[TopRank]<=top_find_rank))

I see one more issue with Rank here is when I apply date filter then also the rank value is static. it should change dynamically as and when we choose date slicer

I had referred this link https://www.burningsuit.co.uk/blog/best-and-worst-two-approaches-finding-top-or-bottom-n-percent-using-dax but I am still stuck.

It would be great if someone can help or guide on this . Please let me know if anything is not very clear .
Thanks much in advance !

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Greg_Deckler — Mon, 03 Oct 2022 12:14:19 GMT

Anonymous TRIMMEAN - Microsoft Power BI Community

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Anonymous — Mon, 03 Oct 2022 14:05:30 GMT

Thanks very much Greg Greg_Deckler !
I am going through the detailed solution and it will take a while for me to understand how the solution is working and apply the same logic in my data model.
I see here we are using calculated table and not sure if we can get rid of this and do it using just column/measures or we have any simpler solution to this .
Thanks again for your help !

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Anonymous — Mon, 03 Oct 2022 15:53:14 GMT

Greg_Deckler I don't want to disturb original fact table as we have other business logic to be applied on whole data. Is it possible to achieve this without introducing another fact table ?

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Greg_Deckler — Mon, 03 Oct 2022 15:58:45 GMT

Anonymous It's a measure. Shouldn't introduce another fact table, just need to use it against your current table. If you post sample data, I can be more specific.

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Anonymous — Mon, 03 Oct 2022 16:33:18 GMT

Greg_Deckler My bad just realized its measure in your pbix file , actually I have been trying with tables/columns/measure and it is still throwing an error .
Here is the sample excel file with data Sample file
Its throwing an error at Value at the end . It would be great if you can help on this
Thanks much !

Re: Need help to calculate average resolution time which excludes top and bottom 1% of values

Anonymous — Tue, 04 Oct 2022 12:33:46 GMT

Greg_Deckler Its working amazingly . Thanks a lot for all your effort and great work 🙂