Distinguishing the Unexplainable from the Merely Unusual : Adding Explanations to Outliers to Discover and Detect Significant Complex Rare Events
ODD '13 Proceedings of the ACM SIGKDD Workshop on Outlier Detection and Description(2013)
Abstract
This paper discusses the key role of explanations for applications that discover and detect significant complex rare events. These events are distinguished not necessarily by outliers (i.e., unusual or rare data values), but rather by their inexplicability in terms of appropriate real-world behaviors. Outlier detection techniques are typically part of such applications and may provide useful starting points; however, they are far from sufficient for identifying events of interest and discriminating them from similar but uninteresting events to a degree necessary for operational utility. Other techniques that distinguish anomalies from outliers, and then enable anomalies to be classified as relevant or not to the particular detection problem are also necessary. We argue that explanations are the key to the effectiveness of such complex rare event detection applications, and illustrate this point with examples from several real applications.
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Key words
Outlier Detection,Anomaly Detection
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