Which feature ensures that only significant changes in data are recorded in the Historian?

The correct answer is Delta Historization. This feature is specifically designed to capture only significant changes in data, which optimizes storage and makes data analysis more efficient. Instead of continuously logging every data point at fixed time intervals, Delta Historization records only the difference or change in the data values that exceed a predefined threshold.

This approach reduces the amount of data stored in the Historian by focusing on significant variations rather than redundant information. As a result, it enhances performance, lowers bandwidth consumption, and facilitates quicker data retrieval for analysis. Delta Historization is particularly useful in environments where data can be quite repetitive or constant for long periods of time, allowing users to concentrate on meaningful changes that might indicate process variations, anomalies, or trends.