What does the method 'Delta with swinging door' measure?

The method known as "Delta with swinging door" primarily records data only when a value crosses a predefined threshold. This approach is particularly useful in scenarios where it's important to capture significant changes in data without generating excessive logs for every minor fluctuation. By focusing on threshold crossings, this method helps streamline data storage and enhances the relevance of recorded information, as only the moments of true significance—where a value crosses a limit—are documented.

In this context, it selectively filters out less important changes, enabling users to concentrate on critical value alterations that matter for analysis, thus making it an efficient choice for monitoring systems where only significant events are of interest. This method differs from others, which might either log all changes indiscriminately, record at fixed intervals, or track only drastic changes, highlighting the strength of the "Delta with swinging door" approach in precise and meaningful data collection.