Initial measurement data (IMD) exception categories are the groupings of exceptions for an IMD based on their functional similarity1. They provide a way to define VEE exceptions in a distinct enough way to understand the root issue that was generated from the VEE rule. The following are the three IMD exception categories that are available when you execute VEE rules:

Issue: This category indicates that there is a problem with the IMD that needs to be resolved before it can be used for further processing. For example, an IMD might have an issue exception if it has a missing or invalid identifier, a missing or invalid date/time, a missing or invalid UOM, or a missing or invalid status2.

Low: This category indicates that the IMD value is lower than expected based on the previous values or the configured thresholds. For example, an IMD might have a low exception if it has a negative consumption, a zero consumption, a low consumption, or a low demand2.

Information: This category indicates that the IMD value is valid but has some additional information that might be useful for analysis or reporting. For example, an IMD might have an information exception if it has a rollover, a reset, a leap year adjustment, or a daylight saving time adjustment2. References:

1: Understanding Exception Types

2: Configuring Exception Types