Difference between last two months data

[Prima_]

Hi,

I have a measure (diff instead of sum in total) to compute the difference between last two months Error Free %

It works but takes time since the data set is huge. Is there any efficient way of doing this?

Measure:
diff instead of sum in total =
Var _TM= Max([prev_monthyear_num])
Var _LM = _TM - 1
Var _ThisMonthV = CALCULATE([% Error Free], 'FINAL'[prev_monthyear_num] = _TM)
Var _PrevMonthV = Calculate([% Error Free],'FINAL'[prev_monthyear_num]=_LM)
return CALCULATE( _ThisMonthV - _PrevMonthV)

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column:
prev_monthyear_num = [Year 1]*100 + [Month 1] -1

------------------------

Measure:
% Error Free = 1 - ('FINAL'[Count of Error] /'FINAL'[Count of Products] )

Thanks.

[lbendlin]

Your approach will only work from February to December.  To cover the scenario for January you need to find the penultimate yearmonth value, rather than trying to subtract 1.

[v-zhangti]

Hi, @Prima_ 

Can you provide sample data for testing? Sensitive information can be removed in advance. What kind of expected results do you expect? You can also show it with pictures or Excel. I look forward to your response.

Best Regards,

Community Support Team _Charlotte

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