Retrospective rolling 6 month average based on given criteria

Hi Whitney ,

Try the following formula to create measures:

CurrentMonth = MAX('Slicer Table'[Current Month])

relative = 
VAR MaxDate = [CurrentMonth]
VAR MinDate = EOMONTH(MaxDate,-6) + 1
VAR IsWip = 
    IF(
        MAX('Calendar'[Date]) >= MAX('Table'[Stage 1 start])
        && MAX('Calendar'[Date]) <= EOMONTH(MAX('Table'[Stage 2 start]) ,-1),
        "WIP"
    )
return 
    IF(
        MAX('Calendar'[Date]) <= MaxDate && MAX('Calendar'[Date]) >= MinDate,
        IsWip
    )

Measure = 
var sum_1 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],-5),"yyyy mmmm"))
  )
var sum_2 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],-4),"yyyy mmmm"))
  )
var sum_3 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],-3),"yyyy mmmm"))
  )
var sum_4 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],-2),"yyyy mmmm"))
  )
var sum_5 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],-1),"yyyy mmmm"))
  )
var sum_6 = 
  CALCULATE(
    SUMX(FILTER('Table',[relative]="WIP"),'Table'[Stage 2 hours]),
    FILTER('Calendar','Calendar'[Year_Month] = FORMAT(EDATE([CurrentMonth],0),"yyyy mmmm"))
  )
var NotNullTotal = IF(sum_1<>BLANK(),1) + IF(sum_2<>BLANK(),1) + IF(sum_3<>BLANK(),1) + IF(sum_4<>BLANK(),1) + IF(sum_5<>BLANK(),1) + IF(sum_6<>BLANK(),1)
return DIVIDE( sum_1 + sum_2 + sum_3 + sum_4 + sum_5 + sum_6, NotNullTotal )

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.

Best Regards,
Winniz

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