Oracle Exam 1Z0-1091-22 Topic 8 Question 1 Discussion

The Subtractive Interval Data functionality is a feature that enables Meter Data Management (MDM) to process interval data from devices that do not provide interval readings, but only cumulative readings. The Subtractive Interval Data functionality performs the following actions:

The IMD load processes calculate consumption in engineering units: The IMD load processes are batch processes that load initial measurement data (IMD) records from smart meter systems or other sources into MDM. The IMD load processes calculate consumption in engineering units by subtracting consecutive cumulative readings and applying conversion factors.

A new reading condition field ensures that you do not lose the reading quality when a meter's consumption is estimated: A reading condition field is an attribute that indicates the quality or status of a measurement, such as valid, invalid, estimated, or substituted. A new reading condition field called Original Reading Condition is added to store the original reading condition of a cumulative reading when its consumption is estimated by using VEE rules.

You can optionally validate for rollover exceptions and negative consumption calculations: You can configure VEE rules to check for rollover exceptions and negative consumption calculations when processing subtractive interval data. A rollover exception occurs when a cumulative reading reaches its maximum value and resets to zero. A negative consumption calculation occurs when a cumulative reading decreases instead of increasing.

It is not true that it validates consumption in initial measurement data (IMD), which are records that store the raw measurement data that is received from smart meter systems or other sources. Subtractive Interval Data functionality does not validate consumption in IMD, but calculates consumption from cumulative readings.

It is not true that it converts engineering units into reads, which are values that are recorded by devices at certain intervals or events. Subtractive Interval Data functionality does not convert engineering units into reads, but calculates consumption in engineering units from cumulative readings.