Create list of remaining processes

Hello paumac_tubing 

try this code.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQyTkxKVtJRMjAwApLJpSVKsToowoZAMqk0LQ1d3ARI5iYWZaOLGwPJ4ozMArC4hblZRWUVhvFIwijGI4mjGI8kjjA+FgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"part #" = _t, step = _t, #"step description" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"part #", type text}, {"step", type text}, {"step description", type text}}),
    Sort = Table.Buffer(Table.Sort(#"Changed Type",{{"part #", Order.Ascending}, {"step", Order.Ascending}})),
    Grouped = Table.Group(Sort, {"part #"}, {{"group", each _, type table [#"part #"=nullable text, step=nullable number, step description=nullable text]}}),
    AddList = Table.TransformColumns
    (
        Grouped,
        {
            {
                "group",
                (tableint)=>
                let   
                    
                    AddIndex = Table.AddIndexColumn(tableint,"Index",0),
                    AddList = Table.AddColumn
                    (
                        AddIndex, 
                        "Subsequent",
                        (add) => try Text.Combine(List.Range(AddIndex[step description], add[Index]+1), ", ") otherwise ""
                    )
                in 
                    AddList
            }
        }
    ),
    Expand = Table.ExpandTableColumn(AddList, "group", {"step", "step description", "Subsequent"}, {"step", "step description", "Subsequent"})
in
    Expand

But i realized just now that somebody else was working on the similar approach in the same time 🙂

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

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Kudoes are nice too

Have fun

Jimmy