Field Parameter when used in filter pane not working for TOPN filters

Excellove15 ,

Composite key is not part of the model, it's unpacked in background query for visuals. Thus we need to return somehow parameter value into the model to apply it to filters.

As variant we may create two measures.

Selected Parameter =
VAR SelectedParameter =
    SELECTCOLUMNS (
        SUMMARIZE ( 'Variance', 'Variance'[Parameter], 'Variance'[Parameter Fields] ),
        'Variance'[Parameter]
    )
RETURN
    IF ( COUNTROWS ( SelectedParameter ) = 1, SelectedParameter )

and

Performance =
SWITCH (
    TRUE,
    [Selected Parameter] = "Target Unit Variance", [Target Unit Variance],
    [Selected Parameter] = "Budget Unit Variance", [Budget Unit Variance],
    [Selected Parameter] = "Budget Cost Variance", [Budget Cost Variance],
    [Selected Parameter] = "Target Cost Variance", [Target Cost Variance],
    [Selected Parameter] = "Budget Carbon Variance", [Budget Carbon Variance],
    [Selected Parameter] = "Target Carbon Variance", [Target Carbon Variance],
    [Selected Parameter] = "Target Unit Variance (TimeSeries)", [Target Unit Variance (TimeSeries)],
    [Selected Parameter] = "Target Cost Variance (TimeSeries)", [Target Cost Variance (TimeSeries)],
    [Selected Parameter] = "Budget Unit Variance (TimeSeries)", [Budget Unit Variance (TimeSeries)],
    [Selected Parameter] = "Budget Cost Variance (TimeSeries)", [Budget Cost Variance (TimeSeries)],
    [Selected Parameter] = "Budget Carbon Variance (TimeSeries)", [Budget Carbon Variance (TimeSeries)],
    [Selected Parameter] = "Target Carbon Variance (TimeSeries)", [Target Carbon Variance (TimeSeries)],
    0
)

and use them with visuals

where

Perhaps not good from maintenance point of view, but at least it works.