Output data mismatch/discrepant for some aggregates as provided by OPC UA document.|OPC UA Standard|Forum|OPC Foundation

Hello team.

Please consider the following data as per OPC UA document;

Data for Historain 2 with;

• TreatUncertainAsBad = True.
• Stepped Attribute = False.
• UseSlopedExtrapolation = False.
• PercentBad = 100,  PercentGood = 100.
• Input data for nearby intervals having issue from OPC UA doc;

• 12:01:17	70	Raw, Uncertain	Value is flagged as questionable
  12:01:23	70	Raw, Good
  12:01:26	80	Raw, Good
  12:01:30	90	Raw, Good
  	–	No Data	No more entries, awaiting next Value

For the aggregate Interpolative –

Output provided in the document for the intervals;

• 12:01:30.000	90	Good
  12:01:35.000	102.500	UncertainDataSubNormal, Interpolated

But on manual calculation and cross checking the same with Tester utility of OPC, the value at 12:01:35.000 is 90 when UseSlopedExtrapolation = False, as is the case in H2. Please confirm the finding from your end else please give an explanation of how the value is 102.500.

Similarly for aggregate Time Average –

Output provided in the document for the intervals;

• 12:01:30.000	96.250	UncertainDataSubNormal, Calculated
  12:01:35.000	108.750	UncertainDataSubNormal, Calculated

But on manual calculation and cross checking the same with Tester utility of OPC, the value at 12:01:30.000 is 90 and at 12:01:35.000 is 90 when UseSlopedExtrapolation = False, as is the case in H2. Please confirm the finding from your end else please give an explanation of how the value is 102.500.

Similarly for Total whose calculation is related to TimeAverage.

So here is a summary;

Please confirm whether the above findings are correct or am I doing something wrong.

Thanks and Regards,

Siddhartha.