Hi @Anonymous ,
Here are the steps you can follow：
1. In Power Query -- Add Column – Index Column – From 1.
2. Create calculated column.
First Instance =
IF(
[Index]=
MINX(
FILTER(ALL('Table'),'Table'[Good Qty]=EARLIER('Table'[Good Qty])),[Index]),1,0)3. Result:
Best Regards,
Liu Yang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly
Hi,
This M code works
let
Source = Excel.CurrentWorkbook(){[Name="Data"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Machine", type text}, {"Work Order", type text}, {"Material", type text}, {"Batch", type text}, {"Production Day", type datetime}, {"Machine Scrap", Int64.Type}, {"Good Qty", Int64.Type}}),
#"Sorted Rows" = Table.Sort(#"Changed Type",{{"Machine Scrap", Order.Ascending}, {"Production Day", Order.Ascending}}),
Partition = Table.Group(#"Sorted Rows", {"Good Qty", "Production Day"}, {{"Partition", each Table.AddIndexColumn(_, "Index",1,1), type table}}),
#"Expanded Partition" = Table.ExpandTableColumn(Partition, "Partition", {"Machine", "Work Order", "Material", "Batch", "Machine Scrap", "Index"}, {"Machine", "Work Order", "Material", "Batch", "Machine Scrap", "Index"}),
#"Added Custom" = Table.AddColumn(#"Expanded Partition", "Custom", each if [Index] = 1 then 1 else 0),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Index"})
in
#"Removed Columns"Hope this helps.
Helpful resources
FabCon & SQLCon – Barcelona 2026
Join us in Barcelona for FabCon and SQLCon, the Fabric, Power BI, SQL, and AI community event. Save €200 with code FABCMTY200.
Data Days 2026
Join Data Days 2026: 60 days of free live/on-demand sessions, challenges, study groups, and certification opportunities.
Power BI DataViz World Championships - June 2026
A new Power BI DataViz World Championship is coming this June! Don't miss out on submitting your entry.
