Conditional Formatting using DAX

1) Rule: “If any 3 measures are below threshold in the same month → highlight”

Any3Below_ThisMonth =
VAR t1 = IF( [On Time Delivery %] < [OTD Threshold], 1, 0 )
VAR t2 = IF( [KPI2 %] < [KPI2 Threshold], 1, 0 )
VAR t3 = IF( [KPI3 %] < [KPI3 Threshold], 1, 0 )
RETURN
IF( t1 + t2 + t3 >= 3, 1, 0 )

2) Rule: “If this measure is below threshold in 3 different months in last 12 months → highlight”

OTD_BadMonths_Last12 =
VAR EndDate = MAX('Date'[Date])
VAR MonthsToCheck =
    DATESINPERIOD( 'Date'[Date], EndDate, -12, MONTH )
RETURN
COUNTROWS(
    FILTER(
        SUMMARIZE( MonthsToCheck, 'Date'[YearMonth] ),
        CALCULATE( [On Time Delivery %] ) < [OTD Threshold]
    )
)

OTD_3BadMonths_Flag =
IF( [OTD_BadMonths_Last12] >= 3, 1, 0 )

3) Final: Color measure for conditional formatting (for OTD)

OTD_CellColor =
VAR Rule1 = [Any3Below_ThisMonth] = 1
VAR Rule2 = [OTD_3BadMonths_Flag] = 1
RETURN
IF( Rule1 || Rule2, "#FF0000", BLANK() )

Hi Balakrishnan_J have tested using sample datasets, please review the attached file.