Inconsistent KPI Query Data Ouput

Hi All,

Currently i am facing issue with inconsistency in the KPI query data output

I have SQL query having  data for three Plant Line for the given shifts (12hrs), and the corresponding KPI Object .

The KPI Object is scheduled with 15 mins with Update mode

And finally using the KPI Query - having granularity- Raw ,  Mode -Select.

So the data is coming properly in Sql Query and in KPI Object but at times one row data for any hours (any line ) is missing .

And when the KPI runs in next schedule , the data is coming properly in KPI query .

Anybody faced similar issue , ? Any pointer will be appreciated.

Regards

Ravish